Method and apparatus for squaring and flattening sheets

Details Method and apparatus for squaring and flattening sheets Method and apparatus for squaring and flattening sheets

2007-12-04

2007-12-04

Davis, Robert (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Miscellaneous

C425SDIG048, C425S388000, C271S234000

Reexamination Certificate

active

10654278

ABSTRACT:
Preheated plastic sheets are squared and flattened to be engageable by clamping fingers of clamps on a clamping frame by an array of paddles having vertical and horizontal portions moved to engage any upturned or skewed sheet edges to flatten and square the same as said paddles are simultaneously moved longitudinally and vertically by respective actuators.

REFERENCES:
patent: 1921167 (1933-08-01), Perry
patent: 3342480 (1967-09-01), Camerini et al.
patent: 4919414 (1990-04-01), Marschke et al.
patent: 4989855 (1991-02-01), Polic
patent: 5980231 (1999-11-01), Arends et al.

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