COPYING APPARATUS

• US 3,572,924 A
• Filed: 10/09/1968
• Issued: 03/30/1971
• Est. Priority Date: 10/12/1967
• Status: Expired due to Term

• Current Assignee: Matsumoto Yushi, Tashiro Tsuneo
• Original Assignee: Matsumoto Yushi, Tashiro Tsuneo
• Inventors: MATSUMOTO YUSHI, TASHIRO TSUNEO
• Application Number:
  US04/766,124
• Time in Patent Office: 902 Days
• US Class Current: 355/27
• CPC Class Codes: G03G 15/041 with variable magnification

Abstract

A copying apparatus including an optical system for reproducing an original on a copying paper, each of the original and the copying paper having its one edge located at a definite position. The optical system is arranged such that the edge of the original is always focused on the edge of the copying paper with the original reproduced in a predetermined area of the copying paper irrespective of the multiplying power.

Claims

1. A copying apparatus comprising means to position flatly a copying paper having an image-recording surface with one edge thereof located at a definite position, means to position flatly an original to be copied with one edge thereof located at a definite position, means to illuminate said original, an optical system to focus light from said original on said copying paper to expose said recording surface to said light and means to develop said exposed copying paper, said optical system being arranged such that said one edge of said original at said definite position is always focused on said one edge of said copying paper at said definite position, whereby the image of said original can be reproduced in a predetermined area of said copying paper irrespective of the multiplying power.

2. A copying apparatus according to claim 1 wherein said optical system comprises a lens to collect light from said original and a reflecting mirror to reflect the light passed through said lens and to project it upon said copying paper, said lens is arranged to be moved along a circle passing through at least three points at which said lens is to be located corresponding to different multiplying powers while maintaining the optical axes of said lens in parallel and said reflecting mirror is arranged to be moved to parallel positions in an interlocked relation with the movement of said lens.

3. A copying apparatus according to claim 2 wherein said reflecting mirror is mounted on at least one cam interlocked with the movement of said lens whereby the reflecting mirror is moved in parallel in accordance with the rotary movement of said cam.

4. In a copying apparatus comprising means to position flatly a copying paper having an image-recording surface with one edge thereof located at a definite position, means to position flatly an original to be copied with one edge thereof located at a definite position, means to illuminate said original, an optical system to focus light from said original on said copying paper to expose said recording surface to said light and means to develop said exposed copying paper, said optical system being arranged such that said one edge of said original is always focused on said one edge of said copying paper, so that the image of said original can be reproduced in a predetermined area of said copying paper irrespective of the multiplying power, the improvement therein wherein said optical system comprises a plurality of lenses of different focal lengths to collect the light from said original and means to selectively bring one of said lenses to an operating position on a straight line interconnecting one edge of said original and one edge of said copying paper, corresponding to each other.

5. A copying apparatus comprising:

a. means to flatly position a copying paper having an image-recording surface with one edge thereof located at a definite position;

b. means to flatly position an original to be copied with one edge thereof located at a definite position;

c. means to illuminate said original;

d. an optical system to focus light from said original on said copying paper to expose said recording surface to said light arranged such that said one edge of said original is always focused on said one edge of said copying paper, said optical system including a lens to collect light from said original and a reflecting mirror to reflect the light passed through said lens and to project it upon said copying paper, said lens being arranged to be moved along a circular path passing through at least three points at which said lens is to be positioned corresponding to different multiplying powers while mAintaining the optical axis to said lens parallel to its other positions and said reflecting mirror is mounted on cam means interlocked with the movement of said lens so that said reflecting mirror is disposed in parallel planes in an interlocked relation with the movement of said lens; and

, e. means to develop said exposed copying paper, whereby the image of said original can be reproduced in a predetermined area of said copying paper irrespective of the multiplying power.

6. A copying apparatus according to claim 5 wherein said means to position the leading edge of said copying paper comprises means to transfer a copying paper supplied from a paper-feeding device and means to detect the leading edge of said copying paper to stop a transfer mechanism.

7. A copying apparatus for reproducing original material in various sizes on copying paper, said apparatus comprising means to flatly position the copying paper and the original paper each in a separate plane so that one edge of said original and copying papers are in predetermined locations, the planes of said original and copying papers being at an angle to each other, the centerline of the plane defined by said original material forming a first optical axis, and optical system including a lens and a flat mirror, the instantaneous location of which defines a mirror plane interposed between said original and copying paper positions, and, mechanical and cam means interlocking said mirror and said lens so that said various mirror planes to which said mirror is moved are parallel, said lens traveling to predetermined lens positions of magnifying powers corresponding to magnifications between 1/2 to 5, said path of travel being along an arc of a circle having its center on a line parallel to said first optical axis.

8. A copying apparatus according to claim 7 wherein said lens is supported by a lens supporting member pivotally connected to a pair of parallel links pivotally connected on a machine frame so as to form a parallelogram and moved by operating a handle secured to one of said links.

9. An apparatus as claimed in claim 7, including a handle member (41) said lens (35) being held on a holding member (36) holding said lens so that the lens optical axis is always normal to that of said copying paper plane, pairs of parallel levers (37, 38) pivotably connected to opposite surfaces of said supporting member and to said handle members, gearing between said handle member (41) and a cam member (31) said cam member acting on said mirror, and spring means (32) holding said mirror against said cam member.