Band positioning apparatus

Details Band positioning apparatus Band positioning apparatus

1982-01-21

1984-01-31

Eickholt, E. H.

Printing

Selective or progressive

Printing members

400146, B41J 160

Patent

active

044282869

ABSTRACT:
This invention relates to a system for positioning a high-speed endless loop printing band of the type used on impact band printers. The band positioning apparatus includes a first sensor for being placed adjacent the edge of the endless loop band for detecting the drift of the edge to one side of a reference line. A second sensor is provided adjacent an area of the endless loop printing band for detecting the drift of the edge to the other side of the reference line. A microprocessor is coupled to the first and second sensors for generating a correcting output signal to a step motor. The step motor is coupled to a pulley in guiding communication with the endless loop printing band for displacing the pulley toward the reference line, thereby correcting the undesired movement of the edge of the endless loop printing band.

REFERENCES:
patent: 3665850 (1972-05-01), Berger et al.
patent: 3828669 (1974-08-01), Bonafino et al.
patent: 3899968 (1975-08-01), McDevitt
patent: 3983804 (1976-10-01), Thienemann
patent: 3999478 (1976-12-01), Holzman
patent: 4006682 (1977-02-01), Chambolle
patent: 4074068 (1978-02-01), Wada et al.
patent: 4075945 (1978-02-01), Bienholz

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