Lens-fitted photographic film unit with flash device and battery

Details Lens-fitted photographic film unit with flash device and battery Lens-fitted photographic film unit with flash device and battery

1993-07-01

1994-08-09

Blankenship, Howard B.

Special receptacle or package

For holding a machine readable recording medium

For holding a grooved phonograph disc

2063162, G03B 2900

Patent

active

053370996

ABSTRACT:
A lens-fitted photographic film unit has a flash device for emitting a flash of light. A charge switch is adapted to bring the flash device into an on-state, either by rotation of a film advancing wheel, or when a shutter device is cocked. When the flash device is in the on-state, a main capacitor is charged so as to allow emission of a flash of light. In a preferred embodiment, the charge switch is initially turned on so as to keep the flash device in the on-state. In another preferred embodiment, the flash device is in the on-state while the charge switch is on, and is in the off-state while the charge switch is off, in response to the shutter device. When the lens-fitted photographic film unit is contained in a wrapper, an insulating tape is inserted between a positive electrode of the battery and a contact segment. Upon the wrapper being torn off the lens-fitted photographic film unit, the insulating tape is pulled out of the lens-fitted photographic film unit, so as to bring the flash device into the on-state.

REFERENCES:
patent: 4739353 (1988-04-01), Heuer et al.
patent: 4884087 (1989-11-01), Mochida et al.
patent: 4896178 (1990-01-01), Ohmura et al.
patent: 4954858 (1990-09-01), Ohmura et al.

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