Paper feed mechanism with varying contact pressure
AssigneeSiemens Aktiengesellschaft
InventorsRudolf Rekewitz, Hermann Wambach
Life of this patent
Estimating the term…
Abstract
The paper transport shaft of a paper feed mechanism is movably mounted on an arm of a frame-supported spring wire lever. Another arm of the spring wire lever is pivotably mounted and may be set to flex the body of the spring wire lever through a pivot lever. Depending on the pivoting of the pivot lever the contact pressure between a paper pressure roller mounted on the paper transport shaft and a platen is varied. Selectively, the paper transport shaft can be pivoted away from the platen to allow adjustment of the paper inserted in the paper feed mechanism.
Claims7
A paper feed mechanism for printing and typing equipment, comprising:
- (a) a frame;
- (b) a platen;
- (c) at least one paper pressure roller support shaft having first and second ends:
- a first end of said shaft being mounted in said frame;
- (d) at least one paper pressure roller mounted on said shaft;
- and
- (e) means to vary the force applied by said roller against said platen, said means comprising a frame-supported spring wire lever having first and second arms, the second end of said shaft being supported by said first arm of said spring wire lever, said second arm being pivotally supported and settable at a plurality of predeterminable pivot positions, said spring wire lever being movable to and from an additional predetermined position to move said roller away from and toward said platen whereby both the position of said roller with respect to said platen and the force applied by said roller against said platen may be selectively varied by setting the position of said second arm so that the holding pressure of paper which may be insertable between said platen and said roller is selectively variable.
Dependencies are inferred from the claim text.