Typewriting machines – Sheet or web – Including programmed-control-system for record-medium feed
Patent
1977-03-01
1978-07-18
Mancene, Louis G.
Typewriting machines
Sheet or web
Including programmed-control-system for record-medium feed
101235, 271 3, 400622, 400645, 400708, B41J 2944, B41F 1300
Patent
active
041010183
ABSTRACT:
Paper is carried on an apertured platen and is rotated past a slowly moving printing head so as to scan in a raster fashion from top to bottom and from left to right over the surface of the paper. The paper is held to the platen drum by a vacuum that is applied to the inside of the platen. A valve is located at the entrance of the vacuum system of the platen in order to rapidly dissipate the vacuum so as to release or remove the paper from the still rapidly rotating platen. To facilitate inserting and releasing paper, a shroud system is placed very close to the periphery of the drum and guides the paper during insertion to close proximity with the vacuum. An exit door is provided in the shroud at a convenient location to permit the paper to exit from the drum once the vacuum has been dissipated. The size of the drum is made such that its circumference is slightly less than the length of the paper so as to provide overlap of the top and bottom edges of the paper. A light beam is directed tangential to the platen and is blocked once per revolution by the projection of flap of the overlapping edge of the paper. A photocell is placed opposite the light source and senses the temporary blockage of the light beam by the overlapping edge of the paper as the platen rotates.
REFERENCES:
patent: 1007581 (1911-10-01), Lewis
patent: 1351175 (1920-08-01), Lehr
patent: 1930605 (1933-10-01), Bohmert
patent: 2635533 (1953-04-01), Stewart
patent: 2903965 (1959-09-01), Eichenbaum et al.
patent: 2908220 (1959-10-01), Eichenbaum et al.
patent: 3089746 (1963-05-01), Bryer
patent: 3203074 (1965-08-01), Monaghan
patent: 3239215 (1966-03-01), Davis et al.
patent: 3241831 (1966-03-01), Axliel
patent: 3258530 (1966-06-01), Fowlie et al.
patent: 3335661 (1967-08-01), Moschetti et al.
patent: 3373685 (1968-03-01), Adams
patent: 3405633 (1968-10-01), Price, Jr. et al.
patent: 3468279 (1969-09-01), Tseo
patent: 3502323 (1970-03-01), Dempsey
patent: 3578315 (1971-05-01), Milford
patent: 3609724 (1969-12-01), Allison et al.
patent: 3618123 (1971-11-01), Buddendeck
patent: 3663012 (1972-05-01), Honert
patent: 3831727 (1974-08-01), Kruspe
patent: 3834289 (1974-09-01), Behrens et al.
patent: 3898930 (1975-08-01), Ikegami
Albrecht J. C.
Dosse W. G.
Hirsch Paul J.
Mancene Louis G.
Teletype Corporation
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