Method and apparatus for making easy open flexible bag filled with compressed flexible articles
US5022216A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1989 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Dec 6, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D85/07
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for making an easy open substantially rectangular bag of compressed flexible articles in which the flexible articles are arranged in a stack and held in compression in a direction substantially parallel to their thickness. The preferred method includes the steps of: (a) partially erecting a flexible bag including a substantially continuous line of weakness; (b) forming a stack of flexible articles; (c) compressing the stack of flexible articles between a pair of opposed knife belt assemblies; (d) inserting the knife belt assemblies into the open bottom end of the partially erected flexible bag; (e) simultaneously driving the opposed knife belts associated with the knife belt assemblies in a direction which advances the stack of compressed articles into contact with the innermost surface of the top panel of the partially erected flexible bag; (f) completely retracting the knife belt assemblies from the open end of the partially erected flexible bag; (g) folding the open bottom end of the partially erected, filled flexible bag to form a closed bottom panel; and (h) securing the bottom panel of the easy open bag in a closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.