A low pressure container for dispensing a product, even products of high viscosity, namely about 10,000 cps. or higher, at pressures of only about 6-40 lbs. per sq. in. gauge (psig). The low pressure reduces the safety hazard to practically zero, reduces the cost of the container very substantially and...http://www.google.ca/patents/US4271991?utm_source=gb-gplus-sharePatent US4271991 - Low pressure dispensing
