GB294328A - Improvements in copying machines - Google Patents
Improvements in copying machinesInfo
- Publication number
- GB294328A GB294328A GB1438827A GB1438827A GB294328A GB 294328 A GB294328 A GB 294328A GB 1438827 A GB1438827 A GB 1438827A GB 1438827 A GB1438827 A GB 1438827A GB 294328 A GB294328 A GB 294328A
- Authority
- GB
- United Kingdom
- Prior art keywords
- roller
- rollers
- sheet
- carriage
- composition
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
- B41L9/00—Apparatus for indirectly duplicating from hectographic originals by means of hectographic intermediaries or transfer surfaces, i.e. "dry duplicators"
- B41L9/04—Apparatus for indirectly duplicating from hectographic originals by means of hectographic intermediaries or transfer surfaces, i.e. "dry duplicators" with flat supports over which gelatin-paper is stretched
Landscapes
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
294,328. Gledhill, A. H. May 28, 1927. Copying documents, drawings, and the like.- Improvements are described in machines for copying documents, drawings, &c. of the kind comprising an impression roller A, Fig. 1, mounted in pivoted arms a' in a carriage E, which is reciprocated by hand over a duplicating- composition supported on a flat bed, the roller A, in the inoperative position, being raised off the bed and separated from a co-operating, spring- pressed feed roller B, so that a sheet may be inserted between these rollers and up to a front stop, whereupon the roller A is swung down and the sheet is fed out between the rollers as the carriage travels across the bed. (1) To prevent premature engagement between the rollers A, B with consequent forming of a loop of paper in front of the roller A, a promotion b<1>, Fig. 4, is provided on each one of a pair of arms b supporting the roller B, and each arm a' engages a projection b<1> to separate the rollers until the roller A almost arrives at the operative position : the projections b<1> then drop into recesses a<2> in the arms a<1> and allow the rollers to engage. (2) To adjust the pressure of the roller A on the duplicating-composition, and to allow this roller to adjust itself to inequalities in the composition, the carriage is supported at each side on spring-pressed plungers D, Fig. 1, bearing on paths f at the sides of the machine, the pressure being adjusted' by turning screws d. A rough adjustment may be effected by means of the grub screw usually provided in this type of machine. (3) To avoid distortion of the roller A and to cause it to bear uniformly over the whole width of the sheet, a screw adjustable roller C, Fig. 6, is arranged to bear on the roller A at one or more intermediate points.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1438827A GB294328A (en) | 1927-05-28 | 1927-05-28 | Improvements in copying machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1438827A GB294328A (en) | 1927-05-28 | 1927-05-28 | Improvements in copying machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB294328A true GB294328A (en) | 1928-07-26 |
Family
ID=10040279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1438827A Expired GB294328A (en) | 1927-05-28 | 1927-05-28 | Improvements in copying machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB294328A (en) |
-
1927
- 1927-05-28 GB GB1438827A patent/GB294328A/en not_active Expired
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