US3815639A - Corrugated tubing - Google Patents
Corrugated tubing Download PDFInfo
- Publication number
- US3815639A US3815639A US00259383A US25938372A US3815639A US 3815639 A US3815639 A US 3815639A US 00259383 A US00259383 A US 00259383A US 25938372 A US25938372 A US 25938372A US 3815639 A US3815639 A US 3815639A
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- United States
- Prior art keywords
- strip
- margin
- tube
- strips
- corrugations
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
- F16L11/16—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics wound from profiled strips or bands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
- B21C37/121—Making tubes or metal hoses with helically arranged seams with non-welded and non-soldered seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
- B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes
Definitions
- a leading margin of an outer strip overlaps a lagging margin thereof along a corrugation. That corrugation is pressed along with a mating corrugation of the inner strip to form a headshaped or snap-button-shaped fold whereby the inner and outer strips are united.
- a helically grooved, flexible two-layer tubing of strips of sheetmetal or plastic is characterized by the fact that the edges of the strip forming the inner layer are folded together and the edges, lying spaced between each two folds, of the strip forming the outer layer are developed, together with the underlying rib of the inner layer, into a head-like or snap-fastener-like fold.
- An apparatus for manufacturing such tubing is characterized by the fact that three folding rollers are arranged around a winding mandrel behind the feed for a preshaped sheetmetal strip in the path of said strip at approximately equal distances apart, the first of said rollers pressing the rib formed by the overlapping edges to the side, the second pressing the laterally pressed rib more strongly against the winding mandrel, and the third being furthermore provided a second feed for a preformed sheet-metal strip which, covering the fold of the first strip, is wound on same, and folding rollers acting from the inside and outside which compress the rib on which the edges of the second strip overlap towards the outside, with the formation of a head-shaped or snap-button-shaped fold.
- One method of producing helically grooved flexible tubes from sheetmetal strips preformed with grooves is characterized in accordance with the invention by the fact that first of all a sheet-metal strip is wound with overlapping edges on a winding mandrel and the edges are connected with each other by one or more shaping rollers forming a fold, and thereupon a second strip having the same preshaping is wound over the tube on the winding mandrel, its edges coming to lie approximately in the middle between the folds of the tube which is already wound and thereupon between shaping rollers acting from the inside and outside the rib is compressed on the overlap of the edges of the second strip to form a head-shaped or snap-button-shaped fold.
- FIG. lb is a view of this device seen in the direction of the axis of the winding core.
- FIG. 2 is a diagrammatic view of a wound tube.
- FIG. 3 is a partial section through the winding of the first layer.
- FIG. 4 is a partial section through the first folding of the first layer.
- FIG. 5 is a partial section through the second folding of the first layer.
- FIG. 6 is a partial section through the final folding of the first layer.
- FIG. 7 is a partial section through the first and second layers.
- FIG. 8 is a partial section through the folding of the first and second layers.
- FIG. 9 is a partial section through the finished tube.
- the winding device of FIGS. la and lb consists of a winding mandrel 1 which is driven in rotation in the direction indicated by the arrow A.
- a first folding roller 2 On this winding mandrel 1 there is arranged a first folding roller 2 which is rotated in synchronism in the direction indicated by the arrow B.
- the feed (not shown in detail here) for a strip 3 which as been preshaped with grooves.
- a second folding roller 4 In the direction of the winding pitch and-spaced about from the first folding roller 2 there is arranged on the winding mandrel a second folding roller 4 which is also driven in the direction indicated by the arrow C.
- Another folding roller 5 is arranged on the winding man drel 120 away from the second folding roller 4 in the direction of the winding pitch, it also being driven in the direction indicated by the arrow D.
- two folding rollers namely an inner folding roller 6 and an outer folding roller 7, in such a manner that the point of contact of their cylindrical surfaces lies in the extension of the cylindrical surface of the winding mandrel.
- the outer folding roller 7 is driven.
- a feed (not shown here) for the strip which has been preshaped with grooves for the second layer of the tube.
- FIG. 2 In orderto give an idea of a helically grooved flexible tube, reference is had to FIG. 2.
- FIG. 3 there is shown a cross section through the wall of the first layer, helically wound on the winding mandrel l of the strip which has been preshaped with grooves.
- This cross section lies at a point of the winding mandrel in front of the first folding roller 2 but behind the feed of the strip 3 for the first layer.
- the edges of the helically wound strip overlap in such a manner that the flank of the groove which extends upward on one edge is covered by the flank of the groove which extends downward on the following edge of the strip. This place of overlap is widened, as shown in FIG.
- the folding roller 2 is provided on its cylindrical surface with a shaping portion, protruding ribs 9 and 10 of which engage into adjacent grooves on both sides of the point of overlap of the strip wound into a tubing and between the ribs 9 and 10 it is developed with an asymmetric groove 11 which places the covered overlap rib with the two edges of the strip somewhat to the side and compresses it.
- the groove 11 is made somewhat shallower than the general depth of the grooves of the strip.
- This preformed fold is further compressed, as shown in FIG. 5, by a second folding roller 4.
- this folding roller.4 is provided on its cylindrical surface with two ribs 12 and 13 which are the same distance apart and have the same height as the ribs 9 and 10 of the folding roller 2.
- the groove 14 between these two ribs 12 and 13 is, however, substantially flatter and less curvedso that the overlap rib which has already been bent to one side is compressed further in the direction of the deflection.
- the distance between and the height of the ribs 15 and 16 developed on the cylindrical surface is the same as in the preceding folding rollers 2 and 4.
- the space between these two ribs 15 and 16 is developed as merely a slightly curved recess so that the fold of the overlap point of the strip edges which has been preformed in the two preceding folding rollers istightly and securely compressed.
- the first layer of the strip wound on the winding mandrel 1 has been developed, upon passing the third folding roller 5, into a finished, firmly folded, one-layer tube.
- the tube leaves the winding core and passes by two additional folding rollers 6 and 7.
- the points of contact of the cylindrical surfaces of these two folding rollers lie in the extension of the cylindrical surface of the winding mandrel.
- the inner folding roller 6 is rotatably supported and is provided on its cylindrical surface with a recess which corresponds approximately to the recess of the cylindrical surface of the first folding roller 2.
- two ribs 17 and 18 are so arranged that they engage from the inside into the ribs which are adjacent the overlap groove of the edges of the outer strip.
- this inner folding roller 6 Opposite this inner folding roller 6 and partially extending into its cylindrical surface is an outer folding roller 7 which is driven, in the same way as the folding rollers 2, 4 and 5.
- the cylindrical surface of this outer folding roller 7 is provided with two outer ribs 20 and 21 which extend into the grooves of the tube which are adjacent the overlap groove. Between them is a considerably lower rib 22 which engages into the overlap groove. From FIG. 8 it can be noted that the two-layer tube is guided by the ribs 17 and 18 of the inner folding roller 6 and the ribs 20 and 21 of the outer folding roller 7.
- the inner and outer layer of the two layer tube are connected by folds which are independent .of each other and located spaced from each other and furthermore a firm connection of the two layers is obtained by the head-shape or snap-button shape of the fold of the second outer layer.
- the width of the strips used in practice for an advantageous embodiment is 10.5 ribs or I grooves, the dimension of the strip depending on the shape of the grooves. It is,.of course, also possible to use strips having a larger or fewer number of grooves. From FIG.
- a two-layer tube in ac cordance with the invention must be formed from at least strips having 4 /2 grooves. Such a tube, however, has less flexibility since the folds closely follow each other on the inside and outside.
- a cross section through the wall of the preferred embodiment of a tube in accordance with the invention is shown in FIG. 9.
- a tube comprisingin combination: an elongated inner strip having an inner leading margin and an inner lagging margin each substantially parallel to the other, the inner strip having inner corrugations running substantially parallel to the inner margins,
- the inner strip wound along a helical path with the inner leading margin and the inner lagging margin folded over each other along the helical path, an elongated outer strip having an outer leading margin and an outer'lagging margin each substantially parallel to the other, the outer strip having outer corrugations running substantially parallel to the outer margins,
- the head-shaped fold having a height substantially less than the height of the corrugations, and the head-shaped fold spaced from the folded margins of the inner strips.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
This disclosure teaches a helically corrugated two-layer tube made of strips of sheetmetal or plastic and this disclosure teaches further an apparatus and a method for manufacture of the tube. A leading and a lagging margin of an inner strip are folded over each other along the path of the helix. A leading margin of an outer strip overlaps a lagging margin thereof along a corrugation. That corrugation is pressed along with a mating corrugation of the inner strip to form a head-shaped or snapbutton-shaped fold whereby the inner and outer strips are united.
Description
United States Patent 1191 Westerbarkey CORRUGATED TUBING [75] Inventor: Leonhard Westerbarkey, Gutersloh,
Germany [73] Assignee: Firma Westaflexwerk L. & F.
Westerbarkey, Gutersloh, Zum Stillen Frieden, Germany [22] Filed: June 5, 1972 [21] Appl. No.: 259,383
[30] Foreign Application Priority Data [111 3,815,639 [4 1 June 11, 1974 3,094,147 6/1963 Nemer 138/135 3,340,901 9/1967 Lombardi 138/173 3,572,394 3/1971 Davis 138/154 FOREIGN PATENTS OR APPLICATIONS 233,375 1/1960 Australia 138/135 Primary ExaminerHerbert Goldstein Attorney, Agent, or Firm-Charles E. Baxley [5 7] ABSTRACT This disclosure teaches a helically corrugated twolayer tube made of strips of sheetmetal or plastic and this disclosure teaches further an apparatus and a method for manufacture of the tube. A leading and a lagging margin of an inner strip are folded over each other along the path of the helix. A leading margin of an outer strip overlaps a lagging margin thereof along a corrugation. That corrugation is pressed along with a mating corrugation of the inner strip to form a headshaped or snap-button-shaped fold whereby the inner and outer strips are united.
4 Claims, 10 Drawing Figures CORRUGATED TUBING INVENTION Helically wound, corrugated, flexible tubing formed of two layers of strips is known. In such tubing the two layers of strips are so wound over a winding mandrel that they overlap each other; in general the longitudinal edges of the strip of the one layer lie approximately in the center of the strip of the other layer. After the winding, this tubing is provided on the core of the winding machine with grooves and there is produced, so to say, an interlock by which the wound strips are held together in the wall of the tubing. The strength with which they are held together is, however, not very great and it may happen that the strips loosen from each other and unwind, particularly upon handling during processing or transporation. It has therefore already been proposed to impart the ribs or grooves of the tubing a special shape by which a better form-locked connection is obtained by undercutting or inclining the sides of the grooves. Aside from the fact that such a shaping of the grooves or ribs has certain difficulties inherent in it, other problems also arise; for instance, such a shaping is difficult when the material of which the strips consist is a metal sheet or a plastic of substantial thickness or strength.
In accordance now with the concept of the present invention, a helically grooved, flexible two-layer tubing of strips of sheetmetal or plastic is characterized by the fact that the edges of the strip forming the inner layer are folded together and the edges, lying spaced between each two folds, of the strip forming the outer layer are developed, together with the underlying rib of the inner layer, into a head-like or snap-fastener-like fold. An apparatus for manufacturing head-like or snap-fastener-like fold. An apparatus for manufacturing such tubing is characterized by the fact that three folding rollers are arranged around a winding mandrel behind the feed for a preshaped sheetmetal strip in the path of said strip at approximately equal distances apart, the first of said rollers pressing the rib formed by the overlapping edges to the side, the second pressing the laterally pressed rib more strongly against the winding mandrel, and the third being furthermore provided a second feed for a preformed sheet-metal strip which, covering the fold of the first strip, is wound on same, and folding rollers acting from the inside and outside which compress the rib on which the edges of the second strip overlap towards the outside, with the formation of a head-shaped or snap-button-shaped fold.
One method of producing helically grooved flexible tubes from sheetmetal strips preformed with grooves is characterized in accordance with the invention by the fact that first of all a sheet-metal strip is wound with overlapping edges on a winding mandrel and the edges are connected with each other by one or more shaping rollers forming a fold, and thereupon a second strip having the same preshaping is wound over the tube on the winding mandrel, its edges coming to lie approximately in the middle between the folds of the tube which is already wound and thereupon between shaping rollers acting from the inside and outside the rib is compressed on the overlap of the edges of the second strip to form a head-shaped or snap-button-shaped fold.
- winding device.
FIG. lb is a view of this device seen in the direction of the axis of the winding core.
FIG. 2 is a diagrammatic view of a wound tube.
FIG. 3 is a partial section through the winding of the first layer.
FIG. 4 is a partial section through the first folding of the first layer.
FIG. 5 is a partial section through the second folding of the first layer. I
FIG. 6 is a partial section through the final folding of the first layer.
FIG. 7 is a partial section through the first and second layers.
FIG. 8 is a partial section through the folding of the first and second layers. I
FIG. 9 is a partial section through the finished tube.
The winding device of FIGS. la and lb consists of a winding mandrel 1 which is driven in rotation in the direction indicated by the arrow A. On this winding mandrel 1 there is arranged a first folding roller 2 which is rotated in synchronism in the direction indicated by the arrow B. In front of this first folding roller 2 there is arranged the feed (not shown in detail here) for a strip 3 which as been preshaped with grooves. In the direction of the winding pitch and-spaced about from the first folding roller 2 there is arranged on the winding mandrel a second folding roller 4 which is also driven in the direction indicated by the arrow C. Another folding roller 5 is arranged on the winding man drel 120 away from the second folding roller 4 in the direction of the winding pitch, it also being driven in the direction indicated by the arrow D. Just behind the end of the winding mandrel 1 there are arranged two folding rollers, namely an inner folding roller 6 and an outer folding roller 7, in such a manner that the point of contact of their cylindrical surfaces lies in the extension of the cylindrical surface of the winding mandrel. Of these two rollers, the outer folding roller 7 is driven. Directly in front of these two folding rollers there is a feed (not shown here) for the strip which has been preshaped with grooves for the second layer of the tube.
In orderto give an idea of a helically grooved flexible tube, reference is had to FIG. 2.
The development and shaping of the tube in accordance with the invention as well as details of the apparatus will be described below with reference to FIGS. 3 to 9. In FIG. 3 there is shown a cross section through the wall of the first layer, helically wound on the winding mandrel l of the strip which has been preshaped with grooves. This cross section lies at a point of the winding mandrel in front of the first folding roller 2 but behind the feed of the strip 3 for the first layer. It can be noted that the edges of the helically wound strip overlap in such a manner that the flank of the groove which extends upward on one edge is covered by the flank of the groove which extends downward on the following edge of the strip. This place of overlap is widened, as shown in FIG. 4, by the first folding roller 2 and pressed to one side. For this purpose the folding roller 2 is provided on its cylindrical surface with a shaping portion, protruding ribs 9 and 10 of which engage into adjacent grooves on both sides of the point of overlap of the strip wound into a tubing and between the ribs 9 and 10 it is developed with an asymmetric groove 11 which places the covered overlap rib with the two edges of the strip somewhat to the side and compresses it. For this purpose the groove 11 is made somewhat shallower than the general depth of the grooves of the strip.
This preformed fold is further compressed, as shown in FIG. 5, by a second folding roller 4. For this purpose, this folding roller.4 is provided on its cylindrical surface with two ribs 12 and 13 which are the same distance apart and have the same height as the ribs 9 and 10 of the folding roller 2. The groove 14 between these two ribs 12 and 13 is, however, substantially flatter and less curvedso that the overlap rib which has already been bent to one side is compressed further in the direction of the deflection.
In the case of the third folding roller 5, as shown in FIG. 6, the distance between and the height of the ribs 15 and 16 developed on the cylindrical surface is the same as in the preceding folding rollers 2 and 4. The space between these two ribs 15 and 16 is developed as merely a slightly curved recess so that the fold of the overlap point of the strip edges which has been preformed in the two preceding folding rollers istightly and securely compressed. The first layer of the strip wound on the winding mandrel 1 has been developed, upon passing the third folding roller 5, into a finished, firmly folded, one-layer tube. Tests in actual practice have shown that under special conditions, for instance where the strip material is readily deformable, it is possible to shape and completely fold the first, single-layer tube also with only a singlefolding roller on the winding mandrel. Thereupon another strip 8 which has been preformed with grooves is wound on this finished tube in such a manner that its grooves enter the grooves of the tubing and its edges are about equal distance at both sides from the folds of the tubing. This strip 8 which forms the second layer is so wound up that its edges also overlap in the same way as has been described above in connection with the winding of the first strip. The upward extending groove flank on the one edge of the strip therefore engages over the downward extending groove flank on the other edge of th strip.
After the second strip 8 has been wound in this manner on the tube, the tube leaves the winding core and passes by two additional folding rollers 6 and 7. The points of contact of the cylindrical surfaces of these two folding rollers lie in the extension of the cylindrical surface of the winding mandrel. The inner folding roller 6 is rotatably supported and is provided on its cylindrical surface with a recess which corresponds approximately to the recess of the cylindrical surface of the first folding roller 2. As can be noted from FIG. 8, two ribs 17 and 18 are so arranged that they engage from the inside into the ribs which are adjacent the overlap groove of the edges of the outer strip. Between these ribs 17 and 18 there is formed a wide groove 19 with approximately parallel flanks and an arch which has a depth equal to about two thirds of the depth of the grooves of the tube. Opposite this inner folding roller 6 and partially extending into its cylindrical surface is an outer folding roller 7 which is driven, in the same way as the folding rollers 2, 4 and 5. The cylindrical surface of this outer folding roller 7 is provided with two outer ribs 20 and 21 which extend into the grooves of the tube which are adjacent the overlap groove. Between them is a considerably lower rib 22 which engages into the overlap groove. From FIG. 8 it can be noted that the two-layer tube is guided by the ribs 17 and 18 of the inner folding roller 6 and the ribs 20 and 21 of the outer folding roller 7. These ribs or the folding rollers which engage from the inside into the ribs or from the outside into the grooves of the tube also prevent a deformation of the ribs or grooves of the tube which are adjacent the overlap groove. Only the overlap groove, i.e. the groove of the tube on which the strip edges of the second strip wound on the outside of the tube overlap, is formed by the interengaging folding rollers 6 and 7, this taking place in such a manner that the groove is compressed from the inside to a shallower depth by the arched groove 19 on the cylindrical surface of the folding roller 6, and from the outside the groove is retained in smaller shaped depth by the rib 22 of the folding roller 7 but the compressed part is shaped so that this groove assumes a head-shaped or snapbutton shape and thus a folding. In this way there is produced at this overlap rib a firm, dependable folding together of the overlapping edges of the outer strip. After leaving the cooperating folding rollers 6 and 7, the inner and outer layer of the two layer tube are connected by folds which are independent .of each other and located spaced from each other and furthermore a firm connection of the two layers is obtained by the head-shape or snap-button shape of the fold of the second outer layer. The width of the strips used in practice for an advantageous embodiment is 10.5 ribs or I grooves, the dimension of the strip depending on the shape of the grooves. It is,.of course, also possible to use strips having a larger or fewer number of grooves. From FIG. 8 it can be noted that a two-layer tube in ac cordance with the invention must be formed from at least strips having 4 /2 grooves. Such a tube, however, has less flexibility since the folds closely follow each other on the inside and outside. A cross section through the wall of the preferred embodiment of a tube in accordance with the invention is shown in FIG. 9.
I claim: 1. A tube comprisingin combination: an elongated inner strip having an inner leading margin and an inner lagging margin each substantially parallel to the other, the inner strip having inner corrugations running substantially parallel to the inner margins,
the inner strip wound along a helical path with the inner leading margin and the inner lagging margin folded over each other along the helical path, an elongated outer strip having an outer leading margin and an outer'lagging margin each substantially parallel to the other, the outer strip having outer corrugations running substantially parallel to the outer margins,
the head-shaped fold having a height substantially less than the height of the corrugations, and the head-shaped fold spaced from the folded margins of the inner strips. 2. The tube of claim 1 with the inner and outer strips of sheetmetal.
3. The tube of claim 1 with the inner and outer strips of plastic.
4. The tube of claim 1 with one of the strips of plastic and the other of sheetmetal.
l =l =l
Claims (4)
1. A tube comprising in combination: an elongated inner strip having an inner leading margin and an inner lagging margin each substantially parallel to the other, the inner strip having inner corrugations running substantially parallel to the inner margins, the inner strip wound along a helical path with the inner leading margin and the inner lagging margin folded over each other along the helical path, an elongated outer strip having an outer leading margin and an outer lagging margin each substantially parallel to the other, the outer strip having outer corrugations running substantially parallel to the outer margins, the outer strip wound along the helical path with the outer corrugations overlaying substantially the inner corrugations, at least one of the corrugations of the inner strip pressed along its length with at least one of the corrugations of the outer strip in the form of a head-shaped fold to join the inner and outer strips together, the outer leading margin overlapping the outer lagging margin under the head-shaped fold, the corrugations having a substantially uniform height, the head-shaped fold having a height substantially less than the height of the corrugations, and the head-shaped fold spaced from the folded margins of the inner strips.
2. The tube of claim 1 with the inner and outer strips of sheetmetal.
3. The tube of claim 1 with the inner and outer strips of plastic.
4. The tube of claim 1 with one of the strips of plastic and the other of sheetmetal.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2127750A DE2127750C3 (en) | 1971-06-04 | 1971-06-04 | Double pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
US3815639A true US3815639A (en) | 1974-06-11 |
Family
ID=5809824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00259383A Expired - Lifetime US3815639A (en) | 1971-06-04 | 1972-06-05 | Corrugated tubing |
Country Status (12)
Country | Link |
---|---|
US (1) | US3815639A (en) |
JP (1) | JPS5147896B1 (en) |
AR (1) | AR193873A1 (en) |
BR (1) | BR7203586D0 (en) |
CA (1) | CA958659A (en) |
DE (1) | DE2127750C3 (en) |
ES (1) | ES403432A1 (en) |
FR (1) | FR2141726B1 (en) |
GB (1) | GB1397444A (en) |
HU (1) | HU165472B (en) |
IT (1) | IT958182B (en) |
SE (1) | SE388258B (en) |
Cited By (29)
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US4029129A (en) * | 1976-03-26 | 1977-06-14 | Laffie Harper | Helical pipe lock seam |
US4085604A (en) * | 1976-02-09 | 1978-04-25 | Manufacturers Systems, Inc. | Method of making corrugated flexible metal tubing |
US4141385A (en) * | 1972-07-17 | 1979-02-27 | Emil Siegwart | Flexible corrugated tube |
EP0104842A2 (en) * | 1982-09-28 | 1984-04-04 | Security Lumber & Supply Co. | Improved strip of flexible corrugated material |
US4481978A (en) * | 1978-07-04 | 1984-11-13 | Westaflex-Werk L.U.F. Westerbarkey Gmbh & Co. | Method of manufacturing helically wound tubes and tubes manufactured by said method |
US4622838A (en) * | 1982-09-28 | 1986-11-18 | Security Lumber & Supply Co. | Apparatus for manufacturing flexible corrugated tubes |
US4687690A (en) * | 1984-02-20 | 1987-08-18 | Rib Loc Hong Kong Limited | Method of and means for forming and sealing helically wound tubes |
US4714508A (en) * | 1986-03-25 | 1987-12-22 | Alopex Industries, Inc. | Fixture and method for making spiral wound hose |
US4753256A (en) * | 1985-11-18 | 1988-06-28 | Alopex Industries, Inc. | Pool cleaner hose |
US4854416A (en) * | 1986-06-09 | 1989-08-08 | Titeflex Corporation | Tuned self-damping convoluted conduit |
US4867269A (en) * | 1987-06-30 | 1989-09-19 | Titeflex Corporation | Tuned self-damping convoluted conduit |
US5074138A (en) * | 1991-01-09 | 1991-12-24 | Miller Robert F | Method of making bellows pipe |
US5158115A (en) * | 1991-01-09 | 1992-10-27 | Miller Robert E | Bellows pipe construction |
US5158814A (en) * | 1991-04-04 | 1992-10-27 | Hose Master, Inc. | Flexible metal conduit and method of making the same |
US5222288A (en) * | 1991-06-17 | 1993-06-29 | Tru-Flex Metal Hose Corporation | Method for forming a spiral-wound flexible piping |
US5350885A (en) * | 1992-04-08 | 1994-09-27 | Monogram Industries, Inc. | Armored cable |
US5494319A (en) * | 1994-06-06 | 1996-02-27 | Tru-Flex Metal Hose Corporation | Sleeved flexible metal piping, method of manufacturing same and flue system application of same |
US5538294A (en) * | 1994-11-01 | 1996-07-23 | Tru-Flex Metal Hose Corporation | Corrugated flexible metal piping assembly |
US6311736B2 (en) | 1998-05-28 | 2001-11-06 | Donaldson Company, Inc. | Flexible hose and method for manufacturing |
US6378561B1 (en) * | 2001-02-24 | 2002-04-30 | Tru-Flex Metal Hose Corp. | Self-sealing flexible metal hose |
US6418971B1 (en) * | 2001-07-10 | 2002-07-16 | Hose Master, Inc. | Flexible metal conduit |
US6488052B2 (en) * | 2001-03-19 | 2002-12-03 | Westfalia Metallformtechnik Gmbh & Co. | Multilayer tube formed of profiled strip |
US6497254B2 (en) * | 2001-02-24 | 2002-12-24 | Tru-Flex Metal Hose Corporation | Self-sealing flexible metal hose |
US6825418B1 (en) | 2000-05-16 | 2004-11-30 | Wpfy, Inc. | Indicia-coded electrical cable |
US20060131044A1 (en) * | 2004-12-03 | 2006-06-22 | Vertente Michael J | Flexible conduit and cable |
US7954530B1 (en) | 2009-01-30 | 2011-06-07 | Encore Wire Corporation | Method and apparatus for applying labels to cable or conduit |
US8826960B1 (en) | 2009-06-15 | 2014-09-09 | Encore Wire Corporation | System and apparatus for applying labels to cable or conduit |
US9409668B1 (en) | 2007-06-04 | 2016-08-09 | Encore Wire Corporation | Method and apparatus for applying labels to cable |
US11319104B1 (en) | 2009-01-30 | 2022-05-03 | Encore Wire Corporation | System and apparatus for applying labels to cable or conduit |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2950440A1 (en) * | 1979-12-14 | 1981-06-19 | Ohler Eisenwerk, Theob. Pfeiffer, 5970 Plettenberg | Winding tube with overlapped strip edge - has overlapped edges connected by folding in double row |
CA1146097A (en) * | 1980-09-19 | 1983-05-10 | Emil Siegwart | Flexible corrugated tube |
DE3441565A1 (en) * | 1984-11-14 | 1986-05-15 | Fritz Hahn Kg, 5500 Trier | METHOD AND DEVICE FOR PRODUCING A FLEXIBLE CORRUGATED TUBE AND FLEXIBLE CORRUGATED PIPE PRODUCED BY THE METHOD |
GB2227806A (en) * | 1989-02-02 | 1990-08-08 | Steelpress | Embossed ducting |
AT394815B (en) * | 1990-01-02 | 1992-06-25 | Walter Schwarz | SHEET METAL TAPE, METHOD AND DEVICE FOR PRODUCING FOLDED SCREW SEAM TUBES |
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- 1972-06-02 GB GB2596372A patent/GB1397444A/en not_active Expired
- 1972-06-02 AR AR242349A patent/AR193873A1/en active
- 1972-06-02 FR FR727219827A patent/FR2141726B1/fr not_active Expired
- 1972-06-02 ES ES403432A patent/ES403432A1/en not_active Expired
- 1972-06-02 BR BR3586/72A patent/BR7203586D0/en unknown
- 1972-06-02 HU HUWE462A patent/HU165472B/hu unknown
- 1972-06-02 JP JP47055007A patent/JPS5147896B1/ja active Pending
- 1972-06-02 SE SE7207298A patent/SE388258B/en unknown
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Cited By (59)
Publication number | Priority date | Publication date | Assignee | Title |
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US4141385A (en) * | 1972-07-17 | 1979-02-27 | Emil Siegwart | Flexible corrugated tube |
US4085604A (en) * | 1976-02-09 | 1978-04-25 | Manufacturers Systems, Inc. | Method of making corrugated flexible metal tubing |
US4108212A (en) * | 1976-02-09 | 1978-08-22 | Manufacturers Systems, Inc. | Corrugated flexible metal tubing and method and apparatus for making same |
US4029129A (en) * | 1976-03-26 | 1977-06-14 | Laffie Harper | Helical pipe lock seam |
US4481978A (en) * | 1978-07-04 | 1984-11-13 | Westaflex-Werk L.U.F. Westerbarkey Gmbh & Co. | Method of manufacturing helically wound tubes and tubes manufactured by said method |
US4622838A (en) * | 1982-09-28 | 1986-11-18 | Security Lumber & Supply Co. | Apparatus for manufacturing flexible corrugated tubes |
EP0104842A3 (en) * | 1982-09-28 | 1984-06-27 | Security Lumber & Supply Co. | Improved strip of flexible corrugated material |
US4486484A (en) * | 1982-09-28 | 1984-12-04 | Security Lumber & Supply Co. | Strip of flexible corrugated material |
EP0104842A2 (en) * | 1982-09-28 | 1984-04-04 | Security Lumber & Supply Co. | Improved strip of flexible corrugated material |
US4687690A (en) * | 1984-02-20 | 1987-08-18 | Rib Loc Hong Kong Limited | Method of and means for forming and sealing helically wound tubes |
US4753256A (en) * | 1985-11-18 | 1988-06-28 | Alopex Industries, Inc. | Pool cleaner hose |
US4714508A (en) * | 1986-03-25 | 1987-12-22 | Alopex Industries, Inc. | Fixture and method for making spiral wound hose |
US4854416A (en) * | 1986-06-09 | 1989-08-08 | Titeflex Corporation | Tuned self-damping convoluted conduit |
US4867269A (en) * | 1987-06-30 | 1989-09-19 | Titeflex Corporation | Tuned self-damping convoluted conduit |
US5074138A (en) * | 1991-01-09 | 1991-12-24 | Miller Robert F | Method of making bellows pipe |
US5158115A (en) * | 1991-01-09 | 1992-10-27 | Miller Robert E | Bellows pipe construction |
US5158814A (en) * | 1991-04-04 | 1992-10-27 | Hose Master, Inc. | Flexible metal conduit and method of making the same |
US5228479A (en) * | 1991-06-17 | 1993-07-20 | Tru-Flex Metal Hose Corporation | Multi-layered flexible piping and method and machine for forming same |
US5222288A (en) * | 1991-06-17 | 1993-06-29 | Tru-Flex Metal Hose Corporation | Method for forming a spiral-wound flexible piping |
USRE38345E1 (en) * | 1992-04-08 | 2003-12-16 | Wpfy, Inc. | Armored cable |
US5350885A (en) * | 1992-04-08 | 1994-09-27 | Monogram Industries, Inc. | Armored cable |
US5468914A (en) * | 1992-04-08 | 1995-11-21 | Monogram Industries Inc. | Armored cable |
US5557071A (en) * | 1992-04-08 | 1996-09-17 | Wpfy, Inc. | Armored cable |
US5708235A (en) * | 1992-04-08 | 1998-01-13 | Wpfy, Inc. | Armored cable |
US5494319A (en) * | 1994-06-06 | 1996-02-27 | Tru-Flex Metal Hose Corporation | Sleeved flexible metal piping, method of manufacturing same and flue system application of same |
US5538294A (en) * | 1994-11-01 | 1996-07-23 | Tru-Flex Metal Hose Corporation | Corrugated flexible metal piping assembly |
US6311736B2 (en) | 1998-05-28 | 2001-11-06 | Donaldson Company, Inc. | Flexible hose and method for manufacturing |
US8278554B2 (en) | 2000-05-16 | 2012-10-02 | Wpfy, Inc. | Indicia-coded electrical cable |
US7465878B2 (en) | 2000-05-16 | 2008-12-16 | Wpfy, Inc. | Indicia-marked electrical cable |
US6825418B1 (en) | 2000-05-16 | 2004-11-30 | Wpfy, Inc. | Indicia-coded electrical cable |
US20050016754A1 (en) * | 2000-05-16 | 2005-01-27 | Wpfy, Inc., A Delaware Corporation | Indicia-marked electrical cable |
US20090084575A1 (en) * | 2000-05-16 | 2009-04-02 | Dollins James C | Indicia-Marked Electrical Cable |
US6497254B2 (en) * | 2001-02-24 | 2002-12-24 | Tru-Flex Metal Hose Corporation | Self-sealing flexible metal hose |
US6378561B1 (en) * | 2001-02-24 | 2002-04-30 | Tru-Flex Metal Hose Corp. | Self-sealing flexible metal hose |
US6488052B2 (en) * | 2001-03-19 | 2002-12-03 | Westfalia Metallformtechnik Gmbh & Co. | Multilayer tube formed of profiled strip |
US6418971B1 (en) * | 2001-07-10 | 2002-07-16 | Hose Master, Inc. | Flexible metal conduit |
US20060131044A1 (en) * | 2004-12-03 | 2006-06-22 | Vertente Michael J | Flexible conduit and cable |
US7420120B2 (en) | 2004-12-03 | 2008-09-02 | Wpfy, Inc. | Flexible conduit and cable |
US10046879B1 (en) | 2007-06-04 | 2018-08-14 | Encore Wire Corporation | Method and apparatus for applying labels to cable |
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US9321548B1 (en) | 2009-01-30 | 2016-04-26 | Encore Wire Corporation | Method for applying labels to cable or conduit |
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US11319104B1 (en) | 2009-01-30 | 2022-05-03 | Encore Wire Corporation | System and apparatus for applying labels to cable or conduit |
US8454785B1 (en) | 2009-01-30 | 2013-06-04 | Encore Wire Corporation | Method for applying labels to cable or conduit |
US11673702B1 (en) | 2009-01-30 | 2023-06-13 | Encore Wire Corporation | Method for applying labels to cable or conduit |
US7954530B1 (en) | 2009-01-30 | 2011-06-07 | Encore Wire Corporation | Method and apparatus for applying labels to cable or conduit |
US11851233B1 (en) | 2009-01-30 | 2023-12-26 | Encore Wire Corporation | System and apparatus for applying labels to cable or conduit |
US8826960B1 (en) | 2009-06-15 | 2014-09-09 | Encore Wire Corporation | System and apparatus for applying labels to cable or conduit |
Also Published As
Publication number | Publication date |
---|---|
FR2141726B1 (en) | 1973-07-13 |
JPS5147896B1 (en) | 1976-12-17 |
HU165472B (en) | 1974-08-28 |
GB1397444A (en) | 1975-06-11 |
SE388258B (en) | 1976-09-27 |
DE2127750C3 (en) | 1981-04-09 |
AR193873A1 (en) | 1973-05-31 |
IT958182B (en) | 1973-10-20 |
ES403432A1 (en) | 1975-05-01 |
CA958659A (en) | 1974-12-03 |
DE2127750B2 (en) | 1973-12-06 |
BR7203586D0 (en) | 1973-06-26 |
FR2141726A1 (en) | 1973-01-26 |
DE2127750A1 (en) | 1972-12-07 |
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