Film wrapping and sealing apparatus
US4869051A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1988 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Aug 31, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/0065
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus for wrapping and sealing stacks of paper sheets from the output of high speed copiers and printers. The apparatus includes a paper handling assembly, a sealing assembly, rolls of a plastic film material, and a tote or hopper system. The paper handler permits single sheet feeding and inverting of sheets when desired. The sealing assembly wraps the stack of sheets with the plastic film and lowers a U-shaped sealing bar assembly around the wrapped package to seal simultaneously three sides thereof. Two of the three sides are parallel and near the edge of the plastic film, and are sealed with non-severing type seams. The third side is perpendicular to the other two sides and is sealed with a severing type seam. The severing type seam is made with a heating element on one side of the sealed plastic layers, and a non-heated cut-off wire located on the other side. The cut-off wire is also used to control the temperature in the seal area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.