Device and method for feeding a sheet

Details Device and method for feeding a sheet Device and method for feeding a sheet

1995-11-06

1997-09-16

Nguyen, John Q.

Winding, tensioning, or guiding

Unwinding

With drive mechanism

242422, 226187, 346136, 355 47, 355 48, B65H 2002, B65H 2020, G01D 1524, G03B 2758

Patent

active

056671644

ABSTRACT:
The axial length of a center roller (subroller) (30) is made shorter than the axial length of a main roller (28), and the center roller (30) is placed so that an axis of the center roller (30) is parallel to an axis of the main roller (28) in a base position and so that a nipping pressure is generated in the center position in the axial direction of the main roller (28). A film (sheet) (20) is thereby subjected to a tension in the center portion thereof due to the pulling force of the center roller (30), and the feeding amounts of the film (20) at the left and right portions therefore vary relative to each other. The film (20) thus displaces in the axial direction of the main roller (28) around the center roller (30).

REFERENCES:
patent: 3073590 (1963-01-01), Romeo et al.
patent: 3161362 (1964-12-01), Smith, II
patent: 3330458 (1967-07-01), Bentzman
patent: 4165029 (1979-08-01), Mitchell
patent: 4534498 (1985-08-01), Nilsson
patent: 4604632 (1986-08-01), Matsumoto
patent: 4642659 (1987-02-01), Nagashima et al.
patent: 4707712 (1987-11-01), Buckley et al.
patent: 4884085 (1989-11-01), Ozawa et al.

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