GB402958A - Improvements in or relating to guillotine paper-cutting machinery and guards therefor - Google Patents
Improvements in or relating to guillotine paper-cutting machinery and guards thereforInfo
- Publication number
- GB402958A GB402958A GB410433A GB410433A GB402958A GB 402958 A GB402958 A GB 402958A GB 410433 A GB410433 A GB 410433A GB 410433 A GB410433 A GB 410433A GB 402958 A GB402958 A GB 402958A
- Authority
- GB
- United Kingdom
- Prior art keywords
- guard
- bar
- knife
- lever
- raised
- 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
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/22—Safety devices specially adapted for cutting machines
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
402,958. Machinery guards. CHAMBERLAIN, S. B., c/o St. Luke's Printing Works, Old Street, London. Feb. 10,1933, Nos. 4104 and 5548. [Class 80 (iv).] A guillotine paper-cutting machine having a rising and falling grid or guard to protect the operator, is provided with (a) means to prevent actuation of the knife until the guard is down in operative position, and also to prevent raising of the guard until the driving clutch is out and the driving shaft has ceased to rotate ; (b) means for preventing the knife from overrunning after a. down and up stroke ; and (c) means for holding the severed portion of the pile of paper as it is pushed by the knife. The guard 18 is mounted on links 19, 21 and the bottom bar 20 is connected at one end to a crank lever 25 which is adjustably connected to a locking bar 27 ; the end of the bar 27 can slide in a slot 32 in a stop plate 31 on the striking-on lever 30. When the clutch is out and the clutchlever 17 is held in the catch 29 on the lever 30, the bar 27 registers with the slot 32 and the guard can be swung down, thus withdrawing the end of the bar 27 from the plate 31. The striking-on lever 30 can then be turned by hand to release the lever 17, but the guard cannot be raised as the bar 27 would be stopped by the plate 31. When the cut is completed, the lever 17 is reset under the catch 29, and the slot 32 and bar 27 again register ; the guard can then be raised. To prevent the guard from being raised if the driving shaft 15 is still running, a pawl 43 on the bar 27 is turned into engagement with a rack 46 by a vane 45 which is deflected by spokes 48 on a small wheel 47 driven by a cord 49 from the shaft 15. The pawl and vane are normally held up by a spring, and if the shaft 15 is stationary, the vane can slide between the spokes 48. To prevent the knife from overrunning, a pivoted strut 51 operated by a link 52a is brought under the knife 13 when the guard is raised, and is tilted out of the path of the knife when the guard is lowered. The upper part of the strut is provided with a crutch 52 and rubber buffer 55; and the lower end is curved to bear on a pillar 53. To hold the severed portion of the pile of paper, spring-controlled vertical rods 37 sliding in guides 36 on a bar 33 carry wheels 39 which bear on the pile, and the rods are raised by a rail 41 mounted on the knife carrier and engaging under tappet rollers 40.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB410433A GB402958A (en) | 1933-02-10 | 1933-02-10 | Improvements in or relating to guillotine paper-cutting machinery and guards therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB410433A GB402958A (en) | 1933-02-10 | 1933-02-10 | Improvements in or relating to guillotine paper-cutting machinery and guards therefor |
Publications (1)
Publication Number | Publication Date |
---|---|
GB402958A true GB402958A (en) | 1933-12-14 |
Family
ID=9770846
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB410433A Expired GB402958A (en) | 1933-02-10 | 1933-02-10 | Improvements in or relating to guillotine paper-cutting machinery and guards therefor |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB402958A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113243278A (en) * | 2021-05-28 | 2021-08-13 | 海南天然橡胶产业集团股份有限公司 | Tapping knife for tapping machine |
-
1933
- 1933-02-10 GB GB410433A patent/GB402958A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113243278A (en) * | 2021-05-28 | 2021-08-13 | 海南天然橡胶产业集团股份有限公司 | Tapping knife for tapping machine |
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