Back to results
US 3,941,287 AGranted
Film pull-down mechanism
AssigneeFirma Arnold & Richter KG
InventorPaul Lohse
Life of this patent
Estimating the term…
Abstract
There is disclosed a film pull-down mechanism comprising a four-pivot linkage with two additional links attached thereto. The two additional links are mounted between a plane containing the film and a plane intersecting the drive means of the mechanism.
Claims11
A film moving mechanism having seven swivel joints, three of which joints are stationery and four of which joints are comprised in a four joint linkage which is adapted to generate a compound curve, and a rotating drive means, said mechanism comprising:
- two link members, one link member being attached to the four joint linkage and said two link members being mounted between a first plane containing the film and a second plane parallel to said first plane and intersecting the drive means;
- and
- a film pull-down claw connected to said one link member for engaging performations in the film and moving that film.
Dependencies are inferred from the claim text.