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US 4,987,683 AGranted
Perforation hand punch
OwnerHeinz Brychinventor
Life of this patent
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Abstract
A perforation hand punch for coding cards has a coding field 31 in its male-female perforation arrangement having four columns and two rows. Accordingly, 4 punch pins may be distributed in a 8 punch pin positions 32, 34, 36, 37, 38, 39, 41 and 42 in a coded manner. Consequently more than 50 different person-related perforation coding can be provided which have 4 holes in each case as standard, so that the risk of forgery as a result of over-punching as in the case of mixed 2- and 4-hole coding is eliminated.
Claims6
A perforation hand punch for coding cards having,
- a male-female perforation arrangement with planes oriented approximately parallel and opposite one another in a closed condition of the perforation hand punch, one of the planes having a first coding field with a multiplicity of punched holes and the other plane having a coding field with a multiplicity of corresponding receiving holes for punch pins situated perpendicular to the plane, and
- two locating pins provided at a longitudinal edge of one of the coding fields, wherein
- (a) eight punched holes and eight receiving holes are arranged four in a row, and
- (b) the locating pins have a larger spacing than required for a column of punched holes and receiving holes.
1 more element
Dependencies are inferred from the claim text.