Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1990-04-19
1991-09-10
Rachuba, M.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51 74R, 51 78, 51326, B24B 2100
Patent
active
050462865
ABSTRACT:
This apparatus and method for removing photographic images from a flexible Mylar film member is based on scraping laterally spaced areas of the film member passing between respective power-driven film-advance rollers and spring-biased pressure rollers. The film member is scraped by power-driven, endless, flexible, abrasive belts passing next to the film-advance and pressure rollers but out of contact with them. Each abrasive belt is tensioned to follow part of the peripheral contour of a belt-deflection roller located next to a film-advance roller. The speed of the abrasive belts is many times greater than the surface speed of the film-advance rollers. Two laterally offset sets of film-advance rollers and abrasive belts engage the film member at different locations along its path of movement, and the last set of abrasive belts scrape segments of the film member that were not scraped by the first set of belts.
REFERENCES:
patent: 1022827 (1912-04-01), Cox
patent: 2424044 (1947-07-01), Miller
patent: 3153306 (1964-10-01), Robischung
patent: 3277609 (1966-10-01), Horie et al.
patent: 3683559 (1972-08-01), Kalwaites
patent: 4201015 (1980-05-01), Reim
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