Photocopying – Projection printing and copying cameras – With focusing or projection screen
Patent
1982-10-27
1984-06-05
Griffin, Donald A.
Photocopying
Projection printing and copying cameras
With focusing or projection screen
355 62, 355 43, G03B 1328
Patent
active
044525273
ABSTRACT:
A photographic enlarger for use in bright light comprises a light-tight space which is enclosed in a casing, a bellows and a box thereon; the box is displaceably mounted on the casing for upward and downward adjustment and contains a light source emanating projecting light, a transparency holder, an enlarging objective and a deflecting mirror. On the floor of the casing a carrier block, which is displaceable freely on the floor in any direction, carries a lenticulated reflecting screen and a hingedly connected masking frame. A light-tightly closable window is provided in the box and permits viewing through the same, when open, the entirety of the surface of the lenticulated screen via the said deflecting mirror. In the front wall of the casing, two handholes having light-tight covering means are provided which allow for manipulation of the carrier block and of the masking frame and also render it possible to switch the light source on and off by means of a light switch inside the casing.
Focussing can be carried out when the window is open, via the deflecting mirror by observing the very bright enlarged image of the transparency on the lenticulated screen. Inside the casing, a sheet of unexposed photographic paper can be taken out of a light-tight envelope and can be placed on the screen, exposed thereon and then returned again to the light-tight envelope.
REFERENCES:
patent: 3644036 (1972-02-01), Canfield
patent: 3773419 (1973-11-01), Sumner et al.
patent: 3890043 (1975-06-01), Pramstraller
patent: 4053219 (1977-10-01), Damm et al.
Hammond Martin G.
Turner George F. A. M.
Ciba-Geigy AG
Falber Harry
Griffin Donald A.
Lee D.
LandOfFree
Photographic enlarger for use in bright light does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Photographic enlarger for use in bright light, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photographic enlarger for use in bright light will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1494909