Paper tray with leaf spring

Details Paper tray with leaf spring Paper tray with leaf spring

1989-06-23

1991-04-09

Olszewski, Robert P.

Sheet feeding or delivering

Feeding

Separators

271160, B65H 108

Patent

active

050058207

ABSTRACT:
A paper bin assembly including a movable bottom tray for holding a stack of print receiving material, such as paper. The assembly is designed for insertion into a machine using sheets of paper, such as a copier or printer. A leaf spring is used to move the tray upwardly to keep the top sheet of the stack in position for being fed from the stack by a paper feeding mechanism. As sheets are fed from the stack, the spring continues to provide the top sheet in position, and continues to provide a correct normal force between the paper feeding mechanism and the top sheet. This is accomplished over a wide range of paper size and density by affording an adjustment mechanism to vary the spring rate. The adjustment mechanism involves a movable spring support member which moves in one direction relative to a fixed spring support member, and by providing an offset in a second dimension between the two spring support members.

REFERENCES:
patent: 3635468 (1972-01-01), Suzuki
patent: 3758105 (1973-09-01), Okamoto
patent: 4337935 (1982-07-01), Sawada et al.
patent: 4350328 (1982-09-01), Katakura et al.
patent: 4726698 (1988-02-01), Weiss et al.
patent: 4765605 (1988-08-01), Abbott
Bensen, "Spring Ramp Paper Tray with Constant Lead Edge Height", 12-1980, Xerox Disclosure Journal, vol. 5, No. 6, p. 593.

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