Photocopying – Contact printing – Light boxes
Patent
1990-10-31
1991-07-09
Grimley, A. T.
Photocopying
Contact printing
Light boxes
271196, 271307, 271310, 271900, 355315, G03G 2100
Patent
active
050310020
ABSTRACT:
A suction type sheet carrying mechanism for a high speed image forming apparatus, in which a sheet is separated from an electrophotosensitive drum by air suction performed by mechanically combining fixed air suction holes of a hollow shaft and rotated air suction holes of belt pulleys. The sheet is stuck onto rotating endless belts and carried along a curved route by air suction performed by combining moving air holes of moving endless belts. High speed air flows through ditches provided on a belt guide board placed under the endless belts. The sheet is carried through a fixing unit under high temperature circumstances by rotating air suction metal rollers arranged perpendicular to the direction in which the sheet is carried. Fixed air suction holes in a hollow shaft and rotating air suction holes at ring-shaped ridges of a cylinder rotated around the hollow shaft of each air suction metal roller combine to form suction to hold the sheet.
REFERENCES:
patent: 3545746 (1968-06-01), Ledger et al.
patent: 3826568 (1974-07-01), Hudson
patent: 3893760 (1975-07-01), Thettu
patent: 3895793 (1975-07-01), Bigenwald
patent: 4291970 (1981-09-01), Di Francesco
patent: 4411420 (1983-10-01), Louis et al.
Dang Thu
Fujitsu Limited
Grimley A. T.
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