US324960A - Light copying apparatus - Google Patents
Light copying apparatus Download PDFInfo
- Publication number
- US324960A US324960A US324960DA US324960A US 324960 A US324960 A US 324960A US 324960D A US324960D A US 324960DA US 324960 A US324960 A US 324960A
- Authority
- US
- United States
- Prior art keywords
- air
- glass
- copying apparatus
- paper
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011521 glass Substances 0.000 description 30
- 239000000463 material Substances 0.000 description 28
- 239000004744 fabric Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 240000002027 Ficus elastica Species 0.000 description 2
- 206010040003 Sensation of pressure Diseases 0.000 description 2
- 229920001195 polyisoprene Polymers 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B27/00—Photographic printing apparatus
- G03B27/02—Exposure apparatus for contact printing
- G03B27/14—Details
- G03B27/18—Maintaining or producing contact pressure between original and light-sensitive material
- G03B27/20—Maintaining or producing contact pressure between original and light-sensitive material by using a vacuum or fluid pressure
Definitions
- the paper upon which the drawing is made, and which is to be copied, and the copying-paper (sensitive paper) are placed below a plate of glass and the latter pressed tight against the papers.
- the glass plate must either be very thick, strong, and perfectly even, or there is great danger of springing or breaking the glass plate.
- My improvement consists in an arrangement whereby the copying paper and the paper containing the drawing are forced against the face of the glass plate by the atmospheric pressure, by which arrangement not only the glass plate may be made considerably lighter or thinner, and the same need not be perfectly smooth or straight, and instead of the ltte of glass some transparent membrane may be substituted.
- Figure I represents a longitudinal section of my improved apparatus.
- Fig. II is asection of part of the same with a suction arrangement attached.
- A is the usual plate of glass.
- B represents the sheet of paper or other material upon which the drawing or picture is made which is to be printed.
- 0 represents the sensitive paper upon which the drawing is to be copied or printed.
- D is a perforated sheet or any suitable material through which the air can pass.
- E is an air-tighttlexible material, such as india-rubber cloth. To this material or cloth (preferably in the center) an air-tight tube, 1*, is attached.
- the atmospheric air is drawn ofl" from between the plate of glass A and the airtight material E by the application and action of the mouth, or by the ar -scribing witnesses.
- any suitable suction apparatus, G at the end of the pipe F.
- the pipe F When the air has been withdrawn, the pipe F must be closed by a suitable cock or other arrangement, (not shown in the drawings,) when the appara tus is ready to be exposed to the light in the usual manner.
- the air having been with drawn from between the plate of glass A and the air-tight material E,the atmospheric press ure against the outside of the material E will insure the perfect tight laying of the different materials against the surface of the plate of glass or other transparent membrane, even if the surface of the same should not be perfeet] y smooth or straight, and will prevent any danger of breaking the plate of glass, even if the same should be very thin.
- the air-tight material E may be provided with an air-cushion, J, around its circumfen ence, resting outside of the sheet of drawing, B, the paper 0, and the sheet D upon the plate of glass, A, and may be held or pressed upon the glass by a suitable frame to stop the admission of air around the outside, and thus assist the withdrawing or exhaustion of the air; or this air-cushion J may be attached to a suitable frame and pressed upon the outer circumference of the material E.
- J air-cushion
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
(No Model.)
H. SACK.
LIGHT COPYING APPARATUS.
Patented Aug. 25, 1885.
q PETERS Photo-Lithographer, Washinglon. D. c.
UNITED STATES PATENT ()FFICE.
HUGO SACK, OF PLAGW ITZ-LEIPSIO, GERMANY.
ILIGHT COPYING APPARATUS.
QPECIPICATION forming part of Letters Patent No. 324,960, dated August 25, 1885.
Application filed December 20, [$84. (No model.)
To all whom it may concern:
Be it known that I, HUGO SACK, a citizen of Germany, residing at Plagwitz Leipsic, in the German Empire, have invented anew and useful Improvement in Light Copying Apparatus, of which the following is a specification.
In light or sun copying apparatus as at present generally arranged the paper upon which the drawing is made, and which is to be copied, and the copying-paper (sensitive paper) are placed below a plate of glass and the latter pressed tight against the papers. By this arrangement the glass plate must either be very thick, strong, and perfectly even, or there is great danger of springing or breaking the glass plate.
My improvement consists in an arrangement whereby the copying paper and the paper containing the drawing are forced against the face of the glass plate by the atmospheric pressure, by which arrangement not only the glass plate may be made considerably lighter or thinner, and the same need not be perfectly smooth or straight, and instead of the ltte of glass some transparent membrane may be substituted.
In the accompanying drawings, Figure I represents a longitudinal section of my improved apparatus. Fig. II is asection of part of the same with a suction arrangement attached.
Similar letters represent similar parts.
A is the usual plate of glass. B represents the sheet of paper or other material upon which the drawing or picture is made which is to be printed. 0 represents the sensitive paper upon which the drawing is to be copied or printed. D is a perforated sheet or any suitable material through which the air can pass. E is an air-tighttlexible material, such as india-rubber cloth. To this material or cloth (preferably in the center) an air-tight tube, 1*, is attached.
The different parts being arranged upon each other in the order above enumerated and shown in the drawings, the atmospheric air is drawn ofl" from between the plate of glass A and the airtight material E by the application and action of the mouth, or by the ar -scribing witnesses.
rangement of any suitable suction apparatus, G, at the end of the pipe F. When the air has been withdrawn, the pipe F must be closed by a suitable cock or other arrangement, (not shown in the drawings,) when the appara tus is ready to be exposed to the light in the usual manner. The air having been with drawn from between the plate of glass A and the air-tight material E,the atmospheric press ure against the outside of the material E will insure the perfect tight laying of the different materials against the surface of the plate of glass or other transparent membrane, even if the surface of the same should not be perfeet] y smooth or straight, and will prevent any danger of breaking the plate of glass, even if the same should be very thin.
The air-tight material E may be provided with an air-cushion, J, around its circumfen ence, resting outside of the sheet of drawing, B, the paper 0, and the sheet D upon the plate of glass, A, and may be held or pressed upon the glass by a suitable frame to stop the admission of air around the outside, and thus assist the withdrawing or exhaustion of the air; or this air-cushion J may be attached to a suitable frame and pressed upon the outer circumference of the material E.
What I claim as my invention, and desire to secure by Letters Patent, is
1. In combination with the glass plate A, paper B, containing the drawing to be copied, and the sensitive or copying paper 0, the per forated material D, and the air-tight material E, provided with a pipe, F, and suitable suction apparatus, substantially as and for the purpose set forth.
2. The combination, with the air-tight material E and the glass plate A, of a light copying apparatus, and the air-cushion .1, around the outer surface of the air-tight material, in the manner and for the purpose described.
I11 testimony whereof I have signed my name to this specification in the presence of two sub- HUGO SACK.
\Vitnesses:
(J. LEONI-IARD'L, \V. RUPP.
Publications (1)
Publication Number | Publication Date |
---|---|
US324960A true US324960A (en) | 1885-08-25 |
Family
ID=2394085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US324960D Expired - Lifetime US324960A (en) | Light copying apparatus |
Country Status (1)
Country | Link |
---|---|
US (1) | US324960A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4576823A (en) * | 1984-10-31 | 1986-03-18 | Davies William A | Vacuum sheet |
-
0
- US US324960D patent/US324960A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4576823A (en) * | 1984-10-31 | 1986-03-18 | Davies William A | Vacuum sheet |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US324960A (en) | Light copying apparatus | |
US654421A (en) | Photographic-printing frame. | |
US1209419A (en) | Photographic device. | |
US708770A (en) | Photographic-printing frame. | |
US601882A (en) | schwarz | |
US607648A (en) | schwarz | |
US725969A (en) | Photographic-printing apparatus. | |
US296391A (en) | Art of printing by sunlight or other light | |
US84168A (en) | Joseph buchtel | |
US679740A (en) | Photographic-printing apparatus. | |
US873901A (en) | Fabric frame for caskets. | |
US699355A (en) | Blue-printing apparatus. | |
US628347A (en) | Photographic-printing frame. | |
US935486A (en) | Printing-frame. | |
US867698A (en) | Blue-printing frame. | |
US1052152A (en) | Printing-frame. | |
US1165237A (en) | Printing-frame. | |
US237248A (en) | David n | |
US1166945A (en) | Pneumatic printing-frame. | |
US251977A (en) | Mechanical musical instrument | |
US711347A (en) | Slide for photographic-plate holders. | |
US3139366A (en) | Apparatus for the production of annular rolled-up elements | |
US694925A (en) | Folding roll-holding camera. | |
SU2735A1 (en) | Pneumatic screen for reproduction | |
US1082863A (en) | Mothproof rug-receptacle. |