Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1978-10-04
1981-03-17
Moses, R. L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 7, 355 71, G03G 1500
Patent
active
042564000
ABSTRACT:
A copying machine capable of making a copy of a selected area of a document, which is provided with a mechanism for setting the base line for copying a document placed on the original table as desired and for aligning the edge of copying material with the selected base line. The base line for copying is selectively determined by moving an indicator and when the moving optical system of the copying machine reaches the selected base line, an imagewise exposure is started. In timing with the exposure, feeding of copying material is also started. The lens of the optical system is moved by a distance determined by the distance which the indicator has moved to select the base line and the edge of the copying material is brought in alignment with the base line. To prevent the unnecessary area of the document from being copied, the area of photosensitive medium corresponding to the unnecessary area is exclusively exposed to light so as to erase the electrostatic latent image on this area.
REFERENCES:
patent: 3827799 (1974-08-01), Koizumi
patent: 3901593 (1975-08-01), Kogiso et al.
patent: 4129378 (1978-12-01), Rattin et al.
Katayama Hajime
Komori Shigehiro
Canon Kabushiki Kaisha
Moses R. L.
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