Material handling apparatus for printing plastic film

Details Material handling apparatus for printing plastic film Material handling apparatus for printing plastic film

1978-05-18

1980-08-26

Fisher, J. Reed

Printing

Multicolor

Rotary machines

101228, 101DIG21, 242 755, 226 30, B41F 1302, B41F 506, B41F 516

Patent

active

042189730

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.

REFERENCES:
patent: 444412 (1891-01-01), Lietze
patent: 633967 (1899-09-01), Smith
patent: 1796912 (1931-03-01), Wood
patent: 2111613 (1938-03-01), Bulford
patent: 2358114 (1944-09-01), Stafford et al.
patent: 3239161 (1966-03-01), Dutro et al.
patent: 3995551 (1976-12-01), Mitter

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