Method of and apparatus for packaging
US4365456A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 1976 |
| Grant date | Dec 28, 1982 |
| Priority date | — |
| Expiry date | May 5, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B53/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A packaging machine for bonding a sheet to opposite walls and over the articles in a paperboard tray. One embodiment has a conveyor to move the trays along a predetermined path that includes, in sequence, a film sheet supply station, a compression and heat bonding station, and a heating tunnel or shrinkage station. As the trays move in the predetermined path, a film sheet is drawn over the tops of the articles in each of the successive trays, and flight bars associated with the compression and heating station interpose the sheet between the trailing and leading walls of each of the successive trays and press the sheet against the adjacent trailing and leading walls. Heating means associated with the said flight bars heat the sheet, while compressed, to form a bond between the sheet and the trailing and leading walls. Two independently movable sets of flight bars are provided for placing each of the trays in compression in the compression and heating station whereby the apparatus is adjustable as required to accommodate trays of different size over a range within the limits of the machine. Cutting means at the compression and heating station separate the sheet between adjacent trays…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.