Photocopying – Projection printing and copying cameras – Detailed holder for photosensitive paper
Patent
1987-11-09
1989-04-18
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Detailed holder for photosensitive paper
354281, 354283, G03B 2758, G03B 1726
Patent
active
048231649
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an image forming apparatus for forming an image of an original on a diapositive for projection.
BACKGROUND ART
In various lecture meetings, scientific publication assemblies and others, charts, photographs and the like are projected as enlarged onto a screen by using a slide projector and an overhead projector as a means for aiding explanation.
For preparation of a slide from an original, it has heretofore been a common practice that a 35-mm camera 61 is fixedly mounted on a supporting column 62 of a two-piece stand 60 in a disposition facing downwardly, as is shown in FIG. 2, wherein an original 64 disposed on a table plate 65 of the two-piece stand with the surface carrying an image facing upwardly is illuminated with a light source 63 such as a projection lamp or stroboscopic flash lamp and the image is taken by operating a shutter of the camera 61. In that case, operator has to adjust the height of the camera 61 mounted on the supporting column 62 in dependence on the size of the original 64, adjust the focus and determine the shutter speed, aperture value in consideration of the type of the original, the type of the light source and brightness. This procedure requires skillfulness, and it has been difficult to obtain a slide which can be used satisfactorily unless the operator is accustomed to handle the camera.
On the other hand, a diapositive for projection by an overhead projector has heretofore been prepared by coping an original image onto a transparent sheet by using an electro-photographic copying machine. With this procedure, however, only the image in black and white can be obtained. In recent years, color image enjoys higher popularity in the CRT display for a computer or the like, not to speak of television and photograph. The projected image in black and white is poor in impression.
Recently, a variety of instant slide films have been proposed which allow color slides to be prepared immediately after photographing by simplifying the development process. A color instant film pack suited for the application mentioned above is commercially available which allows a color diapositive for the overhead projector to be prepared in a simplified manner. However, for using this film pack, an expensive camera destined for use only with this film pack is necessary. Besides, troublesome procedure is required as in the case of the aforementioned photographing procedure for the preparation of slide by copying the original.
In view of the shortcomings of the hitherto known method of preparing the 35-mm slide and the color diapositive for the overhead projector by copying the original as described above, the inventor of the present invention has devised an image forming apparatus which is simple in manipulation as in the case of the copying machine and in which the 35-mm slide film as well as the diapositive for the overhead projector using the instant film pack can be easily prepared from the original.
In this image forming apparatus, a contact glass plate for supporting thereon an original is provided on a top plate of the main body of the apparatus, wherein light reflected from the original illuminated by an original illuminating light source over the whole surface thereof is focused through a focusing optical system having two exchangeable optical paths onto a 35-mm roll film or a film in a film pack loaded in a 35-mm film loading section and an instant film pack holder, respectively, which are provided in a casing of the main body of the apparatus to thereby effectuate exposure to light.
The instant film pack holder can be removably placed to a predetermined set position on the main body of the image forming apparatus, wherein after setting the holder at the predetermined position, a portion of the film of the film pack loaded in the holder which portion is located at an aperture for exposure is exposed to an original image in the state where a light shield plate for preventing sensitization of the film is pulled out.
For the purpose of mounting a mo
REFERENCES:
patent: 3724352 (1973-04-01), Shimomura
patent: 3903532 (1975-09-01), Harrison
patent: 4697902 (1987-10-01), Maehara et al.
Masahiro Ishikawa
Shigeru Suzuki
Thornton David R.
Wintercorn Richard A.
LandOfFree
Image forming apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image forming apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2399341