Cutting – Two tool pairs – driver for one pair moves relative to driver... – Successively acting
Patent
1982-10-25
1985-05-14
Yost, Frank T.
Cutting
Two tool pairs, driver for one pair moves relative to driver...
Successively acting
83925A, B26D 508
Patent
active
045164550
ABSTRACT:
The invention concerns a three-knife trimmer, in which for the purpose of cutting on three sides stacks of books, brochures, or the like, first the side knives and then the front knife, or vice versa, are operated to carry out the cut by a single-revolution shaft, during one revolution, by means of intermediate gears at a single location, whereby the drive system for the knives consists of a guide unit and an operating unit preceding it, which operating unit is comprised of a gear unit (13, 14, 15, 16, 17) with a gear ratio that changes during one revolution of the single-revolution shaft (12). This yields a simple gear system with few parts that is simple in construction, is stable in the path of transmission and shows a harmonic motion pattern, so that the machine can operate at high speeds. The gear unit consists of three gear wheels (13, 14, 15), the axis of the first of which is connected eccentrically with the single-revolution shaft (12) and meshes, through an intermediate wheel (14) with movable turning axis (18), with the third gear wheel (15), which is mounted on the axis of the guide unit (19) that drives the knife assembly, and there is located between the axis of the intermediate wheel (14) and the axes of the first and third gear wheels (13, 15) one guide rod (16, 17) each, which is capable of turning.
REFERENCES:
patent: 442295 (1890-12-01), Seybold
patent: 2214488 (1940-09-01), Stern et al.
patent: 3146650 (1964-09-01), Sarring et al.
patent: 3528332 (1970-09-01), Thumim
patent: 3690208 (1972-09-01), Muller
patent: 4208932 (1980-06-01), Anderson
Chickering Robert B.
Grunewald Glen R.
H. Wohlenberg KG GmbH & Co.
Warren Manfred M.
Yost Frank T.
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