Image reader using two frames each driven by a different motor f

Details Image reader using two frames each driven by a different motor f Image reader using two frames each driven by a different motor f

1990-09-18

1993-06-22

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358474, 358406, 355235, H04N 140

Patent

active

052219747

ABSTRACT:
An image reading device including a contact glass on which an original sheet is set, an exposure lamp for irradiating a face of the original sheet on the contact glass to scan it, a photosensitive element provided below the contact glass, a first mirror for reflecting the light reflected by the original sheet in parallel with an original scanning direction, a second mirror for reflecting the light from the first mirror, a third mirror for reflecting the light from the second mirror, a lens for imaging the light from the third mirror on the photosensitive element, a first moving frame mounting the exposure lamp and first mirror and movable in the original scanning direction, a second moving frame mounting the second and third mirrors and movable following the first moving frame, first and second motors for shifting the first and second moving frames, respectively, and a controller for controlling a driving velocity of the second motor to keep the optical length from the face of the original sheet to be exposed to the light to the lens unchanged.

REFERENCES:
patent: 4344696 (1982-08-01), Murata et al.
patent: 4600293 (1986-07-01), Watanabe
patent: 4620234 (1986-10-01), Watanabe
patent: 4751376 (1988-06-01), Sugiura et al.
patent: 4875104 (1989-10-01), Kamon
patent: 5144122 (1992-09-01), Danley et al.

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