Material handling apparatus for printing plastic film
US4218973A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1978 |
| Grant date | Aug 26, 1980 |
| Priority date | — |
| Expiry date | May 18, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S101/42
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is disclosed apparatus for printing plastic film including polyvinyl chloride stretchable film which comprises conventional multi-color printing apparatus with multiple cylinders, a transport web threaded through the printing cylinders and other rolls so that plastic film may be laid down on the transport web to be transported through the printing apparatus which also may include a drying section. Special arrangements are provided for laying the plastic film onto the transport web from a supply roll and for pulling it off on a take-up roll. At the supply roll, the rolled sheet is surface driven by a friction contact roll which is in turn driven by friction engagement with one of the rolls for the transport web. The take-up roll is driven by a direct mechanical linkage to the main drive shaft for the printing cylinders. In both the case of the supply roll and the take-up roll, the plastic film is stretched on the order of one to five percent by established differences in the speed of the supply roll or take-up roll and that of the transport web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.