Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1984-08-08
1986-12-09
Grimley, A. T.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 3DD, G03G 2100
Patent
active
046277161
ABSTRACT:
A toner handling apparatus for use in transfer-type electrophotographic copying machines, such as a toner collecting container for accommodating the toner collected from a photoconductive member by a cleaner, or an image forming unit which includes the photoconductive member and a copying element (developing device and/or cleaner) disposed around the photoconductive member and adapted to accommodate a developer therein and which is removably installable in its entirety in the main body of the copying machine, which is provided in its opening with a thermally expandable resin and a heater for expanding the resin. The resin, which is unexpanded, expands to a thickness several times to several tens of times as large as the original thickness when heated to the expanding temperature and becomes adhesive upon expansion. When the resin is heated by the heater the opening of the toner handling apparatus is sealed off, whereby the toner handling apparatus can be replaced by a new one, without permitting scattering of the toner through its opening.
REFERENCES:
patent: 3985436 (1976-10-01), Tanaka et al.
patent: 4001928 (1977-01-01), Schweiso
patent: 4376578 (1983-03-01), Tanaka et al.
patent: 4500196 (1985-02-01), Shimura
patent: 4501484 (1985-02-01), Shimura
patent: 4522487 (1985-06-01), Misawa
Grimley A. T.
Minolta Camera Kabushiki Kaisha
Romano C.
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