Mechanism for winding air-tight sheet up and off

Details Mechanism for winding air-tight sheet up and off Mechanism for winding air-tight sheet up and off

1991-08-19

1992-06-23

Wintercorn, Richard A.

Photocopying

Contact printing

Fluid pressure retention of carrier and receiver in exposure...

355 94, G03B 2720

Patent

active

051247461

ABSTRACT:
Positional shifting of a photosensitive film due to poor winding-up and -off of an air-tight sheet is prevented without troublesome adjustments, whereby operationability of a contact printer is enhanced and improved. The air-tight sheet winding mechanism includes a connector frame fixed to a pair of carriages movable along each track rail disposed on both sides of a contact printer, and a roller holder for supporting a sheet roller. The connector frame is engaged with the roller holder by inserting micro bearings into oblong apertures. The roller holder and the sheet roller are engaged with the connector frame to slidably move in a direction B and swing about the micro bearing as shown by an arrow C. An air tight sheet is thus precisely and uniformly wound up and off according to its inherent properties including residual stress and residual strain.

REFERENCES:
patent: 4029404 (1977-06-01), Mizukami et al.
patent: 4437759 (1984-03-01), Mizukami et al.
patent: 4636064 (1987-01-01), Penza et al.
patent: 4707125 (1987-11-01), Ohlig et al.
patent: 4755854 (1988-07-01), Theimer
patent: 4774552 (1988-09-01), Nishihama et al.
patent: 4962405 (1990-10-01), Jones et al.
patent: 4982229 (1991-01-01), Inada et al.
patent: 4999670 (1991-03-01), Wright

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