Cutting – Means to drive or to guide tool – Plural tools selectively engageable with single drive
Patent
1987-05-07
1988-02-16
Schran, Donald R.
Cutting
Means to drive or to guide tool
Plural tools selectively engageable with single drive
83571, B26F 104
Patent
active
047247347
ABSTRACT:
A multipurpose puncher includes a pair of opposed stationary punch units positioned separately on a base, and a movable punch unit mounted slidably between the stationary punch units on the base. A press lever assembly is arranged so that it always associates with the movable punch unit and one of the stationary punch units to form a two-hole puncher while the other of the stationary punch units can be used as a single hole puncher. Furthermore, as desired, the press lever assembly can be adjusted to associate with all of the three punch units to form a three-hole puncher. When the two-hole puncher is formed, the distance between the axes of the punch members can be adjusted to be 78.5 mm. In addition, when the three-hole puncher is formed, the distance between any two adjacent punch members is preferably 108.5 mm.
REFERENCES:
patent: 2534094 (1950-12-01), Yerkes
patent: 2781096 (1957-02-01), Garity
patent: 3392913 (1968-07-01), Neilsen
patent: 4449436 (1984-05-01), Semerjian et al.
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