Patent · US Expired

Sack retention and pressurizing for aerosol type dispensers

US4211344A · kind A · utility

7Cited by
7References
22Claims
0Family size

Inventor

Key dates

Filing dateJul 26, 1978
Grant dateJul 8, 1980
Priority date—
Expiry dateJul 26, 1998

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB65D2583/005
  • WIPO fieldHandling
  • WIPO sectorMechanical engineering

Abstract

In an aerosol type container having a pressure chamber, a product containment sack of an impervious flexible material is centrally retained. The aerosol container is provided with an annular opening defined by an annular lid curl. The lid curl is interlockingly engaged by a collar portion of the sack. A modified valve assembly is sealingly secured within a neck protruding from the sack collar. The sack collar acts as a one-way valve allowing a pressurizing agent to be introduced for the purpose of maintaining a desirable pressure within the container pressure chamber. The invention pertains to pressurizing, sealing and sack retainment of such dispensers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.