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Forces at spaced roller nips are equalized by a spring pivotably attached so as to balance the forces between the rollers.
English (United States)
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Nip Roller/Force Equalizing Assembly
Forces at spaced roller nips are equalized by a spring pivotably attached so
as to balance the forces between the rollers.
Nip rollers such as 10, 11, 12, and 13, when used for sheet feeding,
necessarily involve relatively low nip forces. These forces must be equalized, or
skewing of the paper occurs as it passes through the nips. Wire form spring 15
has a relatively low spring rate. Spring 15 automatically adjusts itself by pivoting
around pivot screw 16 mounted to machine frame 17. Ends 20 and 21 of wire 15
are formed so as to engage shaft 22 at remote spaced points. Mounting brackets
24 and 25 for shaft 22 allow relatively free vertical motion, but retain shaft 22 in
position horizontally. Thus, spring 15 adjusts itself by pivoting around the pivot
point established by mounting screw 16. Wire 15 is formed with a loop around
the shaft of screw 16, and is loosely held by screw 16 so as to allow it to pivot.
Thus, forces from contact points at ends 20 and 21 are equalized.
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