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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 |
| 4648708 |
Pattern transfer apparatus |
Mar. 10, 1987 |
| 4647187 |
Photographic copier |
Mar. 3, 1987 |
| 4647188 |
Image forming system |
Mar. 3, 1987 |
| 4647189 |
Electrophotographic copying machine with variable magnification |
Mar. 3, 1987 |
| 4647190 |
Copier for photographic originals having different sizes |
Mar. 3, 1987 |
| 4645335 |
Focus adjusting mechanism in exposure optical apparatus |
Feb. 24, 1987 |
| 4644499 |
Copying magnification setting device for an electrophotographic copying apparatus |
Feb. 17, 1987 |
| 4641953 |
Image forming apparatus |
Feb. 10, 1987 |
| 4639121 |
Document registration system |
Jan. 27, 1987 |
| 4634261 |
Optical system for reproducing apparatus |
Jan. 6, 1987 |
| 4634266 |
Electrophotographic copying machine with picture position selection function |
Jan. 6, 1987 |
| 4634267 |
Photocopier scanning apparatus and method for adjustment |
Jan. 6, 1987 |
| 4632536 |
Copying apparatus and an optical assembly usable therewith |
Dec. 30, 1986 |
| 4632522 |
Optical system of variable magnification and a method for varying magnification of the same |
Dec. 30, 1986 |
| 4633272 |
Laser printing apparatus having a multiple formatted output |
Dec. 30, 1986 |
| 4630922 |
Pattern transfer apparatus |
Dec. 23, 1986 |
| 4629308 |
Lens and shutter positioning mechanism for variable-magnification copier |
Dec. 16, 1986 |
| 4629314 |
Copying apparatus having variable magnification operation memory function |
Dec. 16, 1986 |
| 4627721 |
Automatic scanning optics alignment |
Dec. 9, 1986 |
| 4624552 |
Magnification control device |
Nov. 25, 1986 |
| 4624553 |
Photographic enlarger apparatus with critical focusing platform for photosensitive medium |
Nov. 25, 1986 |
| 4619521 |
Image processing apparatus |
Oct. 28, 1986 |
| 4618252 |
Copying machine with a variable magnification device |
Oct. 21, 1986 |
| 4618246 |
Image forming device |
Oct. 21, 1986 |
| 4616925 |
Reader printer |
Oct. 14, 1986 |
| 4615611 |
Variable magnification copying machine |
Oct. 7, 1986 |
| 4615614 |
Optical exposure apparatus |
Oct. 7, 1986 |
| 4614423 |
Variable magnification copying apparatus |
Sep. 30, 1986 |
| 4614422 |
Controller for trimming copy sheets from a material web in a copying machine |
Sep. 30, 1986 |
| 4611908 |
Apparatus and method for forming reproductions with desired margin areas |
Sep. 16, 1986 |
| 4611909 |
Magnification selectable image forming apparatus |
Sep. 16, 1986 |
| 4610539 |
Method for automatically selecting a lens |
Sep. 9, 1986 |
| 4607943 |
Control circuit for an electrostatic copying apparatus |
Aug. 26, 1986 |
| 4603962 |
Image forming apparatus with a display device for matching the image size with the copying sheet size |
Aug. 5, 1986 |
| 4602867 |
Copying apparatus |
Jul. 29, 1986 |
| 4601568 |
Document-scanning control apparatus for image-forming apparatus |
Jul. 22, 1986 |
| 4600282 |
Alignment apparatus |
Jul. 15, 1986 |
| 4598994 |
Image formation apparatus capable of different image magnification |
Jul. 8, 1986 |
| 4597663 |
Electrophotographic copying machine of automatic magnification/reduction-controllable type |
Jul. 1, 1986 |
| 4593999 |
Copying apparatus |
Jun. 10, 1986 |
| 4592647 |
Auto-focus setting method and apparatus for printing slide films |
Jun. 3, 1986 |
| 4586814 |
Variable power projecting device |
May. 6, 1986 |
| 4587621 |
Device for electrical variable magnification of document image |
May. 6, 1986 |
| 4586090 |
Document scanners |
Apr. 29, 1986 |
| 4585308 |
Lens frame holding device |
Apr. 29, 1986 |
| 4583845 |
Photographic printer |
Apr. 22, 1986 |
| 4583840 |
Exposure apparatus |
Apr. 22, 1986 |
| 4582420 |
Reproduction camera |
Apr. 15, 1986 |
| 4582419 |
Copying machine |
Apr. 15, 1986 |
| 4582418 |
Variable magnification electrostatic copying apparatus |
Apr. 15, 1986 |
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