Printing – Bed-and-platen machines – Web
Patent
1978-10-02
1981-02-03
Coven, Edward M.
Printing
Bed-and-platen machines
Web
226196, 271251, B41F 108
Patent
active
042481511
ABSTRACT:
A guide which maintains an edge surface of a tape, such as an elongated strip of print stock, in contact with a reference surface formed on a base of the guide as the tape is moved in a predetermined direction and along a predetermined path. Preferably, the guide includes a first roller which is mounted on the base in proximity to the reference surface and which has an axis of rotation which is inclined, in an imaginary plane parallel to the predetermined direction of tape movement, from a normal drawn to the reference surface. A second roller is also mounted on the base in proximity to the reference surface and has its axis of rotation substantially parallel to that of the first roller, with corresponding portions of the peripheral surfaces of the first and second rollers being in proximity to each other to define a nip therebetween for compressing the tape. A stock sensor is supported in the base and defines a slot which is aligned with the nip of the first and second rollers, with a light source and a light sensor being disposed in portions of the stock sensor defining the slot and opposing each other across the slot.
REFERENCES:
patent: 2012130 (1935-08-01), Kellogg
patent: 2674456 (1954-04-01), Gibson
patent: 2916228 (1959-12-01), Wellington
patent: 3929327 (1975-12-01), Olson
patent: 4011814 (1977-03-01), Real
IBM Technical Disclosure Bulletin, Paper Feed Aligner Mech., G. D. Anderson, vol. 15, No. 4, Sep. 1972, p. 1253.
Coven Edward M.
Interface Mechanisms, Inc.
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