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Class Information
Number: 355/55
Name: Photocopying > Projection printing and copying cameras > Focus or magnification control
Description: Subject matter including means to move the holder for the original, the objective lens, and the photosensitive paper holder relative to each other for focusing or changing and degree of magnification or reduction; or including structure adapted to allow interchanging of objective lenses of different focal lengths.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4963922 |
Copying apparatus |
Oct. 16, 1990 |
| 4963934 |
Image forming apparatus capable of shortening document size detection time |
Oct. 16, 1990 |
| 4961090 |
Large media proportional copying system |
Oct. 2, 1990 |
| 4961087 |
Diaphragm adjusting arrangement in a photographic enlarging or copying apparatus having several lenses with an adjustable diaphragm |
Oct. 2, 1990 |
| 4959684 |
Copying machine |
Sep. 25, 1990 |
| 4956672 |
Copying magnification setting device for an electrophotographic copying apparatus |
Sep. 11, 1990 |
| 4952970 |
Autofocusing system for a projecting exposure apparatus |
Aug. 28, 1990 |
| 4947206 |
Copying apparatus |
Aug. 7, 1990 |
| 4942425 |
Microfilm image processing apparatus |
Jul. 17, 1990 |
| 4939545 |
Apparatus for adjusting optical system of an image forming apparatus |
Jul. 3, 1990 |
| 4939538 |
Microfilm image processing apparatus |
Jul. 3, 1990 |
| 4937620 |
Method of focusing printer |
Jun. 26, 1990 |
| 4937762 |
Method and apparatus for combination information display and input operations |
Jun. 26, 1990 |
| 4931863 |
Electronic photographic printer/enlarger |
Jun. 5, 1990 |
| 4922290 |
Semiconductor exposing system having apparatus for correcting change in wavelength of light source |
May. 1, 1990 |
| 4920505 |
Projection exposure apparatus |
Apr. 24, 1990 |
| 4920377 |
Copying apparatus capable of automatically selecting copy paper size and control method for controlling operation of copying apparatus |
Apr. 24, 1990 |
| 4914472 |
Automatic document feeder and a copying apparatus equipped with such an automatic document feeder |
Apr. 3, 1990 |
| 4909623 |
"Microfilm image processing apparatus" |
Mar. 20, 1990 |
| 4904569 |
Method of forming pattern and projection aligner for carrying out the same |
Feb. 27, 1990 |
| 4901113 |
Image-forming device |
Feb. 13, 1990 |
| 4901106 |
Method of determining exposure time for photographic printer |
Feb. 13, 1990 |
| 4901107 |
Lens repositioning device in a copier |
Feb. 13, 1990 |
| 4899193 |
Image recording apparatus having adjustable optical system |
Feb. 6, 1990 |
| 4894682 |
Variable magnification copying apparatus |
Jan. 16, 1990 |
| 4891670 |
Copying machine in which copying magnification can be easily set |
Jan. 2, 1990 |
| 4891662 |
Image forming apparatus |
Jan. 2, 1990 |
| 4887125 |
Method of and device for detecting focusing condition of image incident upon image sensor |
Dec. 12, 1989 |
| 4884099 |
Automatic adjustment of focal length to obtain desired optical reduction ratio in a microfilm camera |
Nov. 28, 1989 |
| 4869999 |
Method of forming pattern and projection aligner for carrying out the same |
Sep. 26, 1989 |
| 4868610 |
Copying apparatus with subjectively stored magnification values |
Sep. 19, 1989 |
| 4866477 |
Automatic lens selection for desired optical reduction ratio in a microfilm camera |
Sep. 12, 1989 |
| 4862218 |
Support and adjusting apparatus for an optical unit |
Aug. 29, 1989 |
| 4862220 |
Copying machine |
Aug. 29, 1989 |
| 4853748 |
Variable magnification copier |
Aug. 1, 1989 |
| 4853752 |
Image processing method |
Aug. 1, 1989 |
| 4851883 |
Copying machine having an auto-paper selection function |
Jul. 25, 1989 |
| 4849789 |
Image duplicating apparatus for multiple images with magnification or reduction alteration during duplication |
Jul. 18, 1989 |
| 4847662 |
Image forming apparatus |
Jul. 11, 1989 |
| 4839699 |
Image reproducing apparatus |
Jun. 13, 1989 |
| 4837711 |
Method for detecting/processing image information |
Jun. 6, 1989 |
| 4837602 |
Photographic printer making differently-sized prints |
Jun. 6, 1989 |
| 4835572 |
Image forming apparatus enabling reversible selection of a default mode of operation |
May. 30, 1989 |
| 4831413 |
Automatic document feeder and a copying apparatus equipped with such an automatic document feeder |
May. 16, 1989 |
| 4827310 |
Copying magnification setting device for an electrophotographic copying apparatus |
May. 2, 1989 |
| 4827433 |
Processing device for changing magnification of image data |
May. 2, 1989 |
| 4825252 |
Color zoom copying apparatus |
Apr. 25, 1989 |
| 4825247 |
Projection exposure apparatus |
Apr. 25, 1989 |
| 4819035 |
Color separation optical reading apparatus |
Apr. 4, 1989 |
| 4819029 |
Copying machine capable of producing a copy with a filing margin |
Apr. 4, 1989 |
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