US 5,294,104 A · Paper feeding device having an adjustable paper feed roller for different sized sheets

Abstract

A paper feeding device for feeding a sheet of paper from a paper feed cassette removably mounted in a body of an equipment includes a paper feed roller, a roller moving member for moving the paper feed roller between a normal position and a specific position, a fixing member for fixing the roller moving member so as to hold the specific position of the paper feed roller upon unloading the paper feed cassette, and a canceling member for canceling the fixation of the roller moving member by the fixing member so as to yet hold the specific position of the paper feed roller upon loading the paper feed cassette again. Accordingly, in the case of continuing to use the paper of the same size, it is possible to eliminate undue reciprocation of the paper feed roller between the normal position and the specific position upon loading and unloading the paper feed cassette and therefore reduce wear.

Claims17

Dependent claims

A paper feeding device for use with a removable paper feed cassette for feeding a sheet from the paper feed cassette to equipment, comprising:

a frame and a shaft supported by said frame;
a paper feed roller positionable in a first position and a second position on said shaft feeding first and second sized sheets respectively from the paper feed cassette;
a roller moving mechanism movable between a first and second position coupled to said frame moving said paper feed roller between said first position and said second position, said roller moving mechanism being in said first position when said paper feed roller is in said first position;
and
a first elastic biasing member carried on said shaft that normally biases said paper feed roller into said first position;
a second elastic biasing member coupled to said roller moving mechanism coupled to said frame to normally bias said roller moving mechanism into said first position;
and
a fixing mechanism coupled to said frame and fixing said roller moving mechanism in said second position upon removal of the paper feed cassette from the equipment.

5 more elements

A paper feed assembly, comprising:

a frame body;
a paper feed device mounted in said body, including
a driving shaft rotatably supported by said body,
a paper feed roller means axially movably mounted on said driving shaft and movable between a first position and a second position,
a first biasing means for normally biasing said paper feed roller means to said first position,
a roller moving means provided in said body and movable between said first position and said second position for normally holding said paper feed roller means in said first position,
a second biasing means for normally biasing said roller moving means to said first position, and
a fixing means provided in said body for fixing said roller moving means against the biasing force of said second biasing means to hold said paper feed roller means in said second position;
and
a paper feed cassette means removably mounted in said body, the paper feed cassette means comprising
a first paper feed cassette for storing a plurality of sheets of paper having a first size,
a second paper feed cassette for storing a plurality of sheets of paper having a second size, said first and second paper feed cassettes being interchangeable in said body,
a canceling member provided in both said first and second paper feed cassettes, wherein said canceling member cancels fixation of said roller moving means by said fixing means upon loading one of said first and second paper feed cassettes into said body, and
a position moving means provided in said first paper feed cassette, for moving said paper feed roller means from said first position to said second position against a biasing force of said first biasing means upon loading said first paper feed cassette into said body to engage said roller moving means and urge said roller moving means against a biasing force of said second biasing means,
wherein said fixing means holds said paper feed roller means in said first position upon unloading said first paper feed cassette from said body.

12 more elements

Dependencies are inferred from the claim text.

Paper feeding device having an adjustable paper feed roller for different sized sheets

Life of this patent

Paper feeding device having an adjustable paper feed roller for different sized sheets

Life of this patent

Abstract

Claims17