Photocopying – Contact printing – Light boxes
Patent
1989-08-14
1991-06-25
Grimley, A. T.
Photocopying
Contact printing
Light boxes
118653, 222DIG1, 355260, G03G 1506
Patent
active
050271563
ABSTRACT:
A seal structure including a seal member for sealing a developer chamber with unused developer accommodated in the chamber. The seal member partly extends outward from the chamber to provide a pull portion and is removable from the chamber by pulling the pull portion. In one embodiment, the seal member is folded over at an intermediate portion thereof to form a folded portion over the pull portion, the folded portion being secured to the body of the developing device and formed in an edge thereof with a tear portion for separating the seal member into an end portion positioned inside the device and the other portion when the seal member is pulled. In another embodiment, the developer chamber is externally provided with a seal holder permitting insertion of the seal member. In another embodiment, the pull portion has an inwardly recessed contour extending from the outer end thereof to at least one side edge of the seal member.
REFERENCES:
patent: 3999654 (1976-12-01), Pollack
patent: 4589579 (1986-05-01), Morita
patent: 4615608 (1986-10-01), Mizutani
patent: 4650070 (1987-03-01), Oka et al.
patent: 4862210 (1989-08-01), Woolley
patent: 4895104 (1990-01-01), Yoshino et al.
patent: 4931838 (1990-06-01), Ban et al.
Grimley A. T.
Mita Industrial Co. Ltd.
Royer William J.
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