Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Pins on flexible belt or chain
Patent
1985-11-25
1987-10-06
Levy, Stuart S.
Advancing material of indeterminate length
Means to engage longitudinally spaced modifications in material
Pins on flexible belt or chain
G03B 122
Patent
active
046977279
ABSTRACT:
In order to maintain document feed tractors, especially of the type which have timing belts made of the elastomeric (rubber or plastic) material, in circumferential registration with the sprocket which engages and can drive the belt, a member is disposed circumferentially outward from the sprocket between the sides of the belt where the pins thereon can engage the perforations in the document. This member presents a spaced circumferential retainer outward from the sprocket a distance slightly greater than the altitude of the pins. Preferably this wall has a notch in alignment with the pins and which the pins slightly clear and are guided. The member provides for minimal frictional drag on the belt while maintaining the circumferential registration of the belt on the sprocket.
REFERENCES:
patent: 3930601 (1976-01-01), Masuda
patent: 4129239 (1978-12-01), Hubbard
patent: 4194660 (1980-03-01), Seitz
patent: 4227821 (1980-10-01), Plaza et al.
patent: 4421261 (1983-12-01), Hubbard
IBM Technical Disclosure Bulletin, vol. 20, No. 11B, Apr. 1978, p. 4741.
IBM Technical Disclosure Bulletin, vol. 28, No. 9, Feb. 1986.
Levy Stuart S.
Lukacher Martin
Precision Handling Devices Inc.
Sohacki Lynn M.
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