Photocopying – Projection printing and copying cameras – Identifying – composing – or selecting
Patent
1983-02-08
1985-12-10
Adams, Russell E.
Photocopying
Projection printing and copying cameras
Identifying, composing, or selecting
355 45, 355 56, 355 64, 355 65, 350445, 350446, 354159, 354210, G03B 2752
Patent
active
045575916
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to a photographic printing apparatus which enables the printing of full size and half size picture film from 135 photographic film onto rolled photographic paper of the same width at the same size.
2. Background Art
Since a full size picture taken on 135 photographic film has a length-to-breadth ratio opposite to that of a half size picture taken on the same film, it has not been easy to obtain prints of the same size from full size and half size negatives in a conventional photographic printing apparatus in which rolled photographic paper sheet is used. To reverse the length-to-breadth ratio to obtain prints of the same size, it has so far been common practice to change the direction of advance of the negative film to the rolled photographic paper through an angle of 90 degrees, or to replace a full size negative by a half size negative and vice versa together with the replacement of the rolled photographic paper by that of a different width.
DISCLOSURE OF INVENTION
The purpose of the present invention is to obtain surely and simply prints of the same size from full size negatives and a half size negatives which does not involve the troublesome method as mentioned above, and this purpose can be attained by using a photographic printing apparatus characterized in that prints of the same size are obtained on photographic paper both from full size and half size photographic films by rotating an image-rotating lens through an angle of 45 degrees when it is fitted, in a photographic printing apparatus in which a plurality of lenses including at least one image-rotating lens are fitted interchangeably.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a plan view showing an embodiment of a lens-interchange member of a photographic printing apparatus which switches interchangeable lenses in a sliding manner;
FIG. 2 is a sectional view along the line A--A of the embodiment shown in FIG. 1;
FIG. 3 is a side view of a lens board fitted with the lenses;
FIGS. 4(a) and 4(b) are each drawings explaining the principle of the image-rotating lens; and
FIG. 5 is an illustration of a long film prepared by joining full size and half size films by a splicing process.
BEST MODE FOR CARRYING OUT THE INVENTION
The following is an explanation of an embodiment of the present invention with reference to the drawings.
FIG. 1 illustrates an embodiment of the lens-interchange member of the photographic printing apparatus which switches between interchangeable lenses for full size and half size, including at least one image-rotating lens, in a sliding manner, and FIG. 2 shows a sectional view along the line A--A of the embodiment shown in FIG. 1.
First, an explanation will be made of the interchange mechanism for the above lenses based on FIGS. 1 and 2. The photographic printing apparatus has a fixed outer frame 1 for the lens-interchange member, to which a slide shaft 3 and a slide shaft 4 are fixed.
A sliding block 7 is fitted to one side of an interchange board 2 for the interchange lenses, and it can be moved along the slide shaft 3 via a guide hole 5. A guide block 8 is fitted to the other side of the interchange board 2 so that it can move along the slide shaft 4 through a guide roller 6 provided on the block. The interchange board 2 moves smoothly along the shafts 3 and 4 through the guide hole 5 and the guide roller 6.
FIG. 1 shows the state in which an image-rotating lens 26 for half size film is at a position in which it is aligned with the optical printing axis. In this state, the interchange board 2 touches a stopper 17 fitted to the outer frame 1 of the interchange member, while the end of a solenoid 13, pushed by a compression spring 15, engages with a pin hole 14a on the slide block 7 to lock it.
When a full size picture is printed, the interchange board 2 must be moved through the distance X so that an image-rotating lens 25 for full size film is aligned with the optical printing axis.
The interchange board 2 is moved by a wire 10, both ends of which are fixe
REFERENCES:
patent: 2405729 (1946-09-01), Altman
patent: 3338654 (1967-08-01), Clapp
patent: 4060324 (1977-11-01), Wakatsuki
patent: 4135810 (1979-01-01), Walter
Hakamada Haruo
Serizawa Moriyoshi
Adams Russell E.
Bierman Jordan B.
Konishiroku Photo Industry Co,., Ltd.
Rutledge Della
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