Patent · US Expired

Controlled environment sealing apparatus and method

US6202388A · kind A · utility

19Cited by
122References
21Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 6, 1998
Grant dateMar 20, 2001
Priority date—
Expiry dateNov 6, 2018

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB65B31/028
  • WIPO fieldHandling
  • WIPO sectorMechanical engineering

Abstract

A controlled environment sealing apparatus includes a reciprocating seal head positioned above an intermittent conveyer carrying product-filled trays, a film feeder to dispense film between the tray and reciprocating seal head, and at least one seal head gassing assembly positioned in the seal head and oriented to direct a flow of controlled environment gas through a cut-out portion of the film into a product-filled tray positioned beneath the seal head. The seal head gassing assembly may preferably direct a high velocity controlled environment gas stream surrounded by a lower velocity controlled environment gas stream downward into the tray.

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