Patent EP0163791A1 successfully refreshed from Google Patents.
EP0163791A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Colour xerography apparatus
Assignee: Fujifilm Business Innovation Corp
•
Filing: 1984-12-11
•
Granted: —
•
Expires: 2004-12-11
Abstract
Abstract An image sensor (52) scans a colour original (51) and produces a signal including separated colour components. Marking units (54a-54d) around a transfer drum (53) develop a colour image on copy paper. A controller operates each marking unit (54) when the copy paper is appropriately placed.
Inventors
- 👤 Susumu Hiranuma
- 👤 Michio Hiraga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 12:20
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/01; G03G15/0142; G03G15/0178; G03G15/0194
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
Colour xerography apparatus comprising a transfer drum (53) and means (56) for feeding copy paper to the drum (53) characterised by an image sensor (52) for scanning a colour original (51) and producing a signal including separated colour components, marking units (54) around the drum (53) each for developing a colour image on the copy paper, and a controller (80) for operating each marking unit (54) when the copy paper is appropriately placed.
Claim 2
Dependent Claim
73 words
Colour xerography apparatus comprising a transfer drum (53) and means (56) for feeding copy paper to the drum (53) characterised by an image sensor (52) for scanning a colour original (51) and producing a signal including separated colour components, marking units (54) around the drum (53) each for developing a colour image on the copy paper, and a controller (80) for operating each marking unit (54) when the copy paper is appropriately placed.
Claim 3
Dependent Claim
30 words
Colour xerography apparatus according to claim 1 in which the marking units include a photosensitive drum (71), a raster output scanner (58), a developing unit (74) and a cleaner (72).
Claim 4
Dependent Claim
36 words
Colour xerography apparatus according to claim 1 or claim 2 in which the angle formed between the transfer positions of marking units (54a) and (54d) at the centre of the drum (53) is 180° or less.
References Cited (Backward Citations)
US3690756A
Cited
CH568593A5
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.