SAFETY VALVE FOR HEATING OR REHEATING, COOLING OR RECOOLING OR VENTILATING PACKAGES CONTAINING PRODUCTS

摘要

PCT No. PCT/FR95/00408 Sec. 371 Date Sep. 30, 1996 Sec. 102(e) Date Sep. 30, 1996 PCT Filed Mar. 30, 1995 PCT Pub. No. WO95/26912 PCT Pub. Date Oct. 12, 1995A safety valve device for packages of products to be cooked, cooled, reheated, or degassed and a package that includes such a safety valve. The valve includes a peripheral portion attached to the package support and a movable flap with an end portion connected to the peripheral portion to form a hinge portion exerting a resilient return force determined by bending slots shaped so that the end portion retains a certain degree of rigidity and has a sensitive shape memory function, enabling it to be opened by gas pressure and dynamically closed upon cooling. A projection on the underside of the flap acts as seal engaging the recess in the package support during cooling, and includes suitably positioned spikes for engaging one or more gas discharge outlets in the recess.