Laser shutter mechanism

Details Laser shutter mechanism Laser shutter mechanism

1989-10-24

1992-10-06

Reinhart, Mark J.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

355210, H04N 121

Patent

active

051536072

ABSTRACT:
A laser shutter mechanism is provided and fitted to a window in an optical system container of, e.g., an optical scanning unit in a laser beam printer. The shutter comprises a screen member for preventing the laser beam from emitting through a window to a beam receiving unit. The screen member is movable between its operative and inoperative positions, while it is biased to its operative position wherein it closes the window. An operating member is provided on the beam receiving unit for moving the screen member to its inoperative position where the window is allowed to emit the laser beam therethrough. Only when said beam receiving unit is properly positioned against the window, does the operating member moves the screen member.

REFERENCES:
patent: 4100419 (1978-07-01), Pedroso
patent: 4588280 (1986-05-01), Ogawa et al.
patent: 4826268 (1989-05-01), Kramer
patent: 4943815 (1990-07-01), Aldrich

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