Printing – Inkers – Roller
Reexamination Certificate
2000-02-16
2001-04-24
Asher, Kimberly (Department: 2854)
Printing
Inkers
Roller
C101S350300, C101S352060
Reexamination Certificate
active
06220159
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a crank mechanism with a length-adjustable crank. Adjustment of the crank length or stroke is accomplished using two concentric, relatively rotatable eccentrics.
DESCRIPTION OF THE PRIOR ART
DE-OS 17 61 389 discloses a device for adjusting a friction cylinder stroke in an ink system of a rotary printing press. Here, a crank of the crank mechanism essentially consists of an eccentric pin and an eccentric bushing seated thereon. The eccentric bushing can be pivoted in relation to the pin by means of a planetary wheel gear.
DE 27 10 135 B2 describes a device for setting the angle of a distribution insert. Here, a phase position between a drive shaft with a helix-shaped groove, and a drive shaft is adjusted by means of a sliding bushing.
DE-PS 687 918 discloses a gear for converting a back-and-forth movement into a rotary movement.
DE-AS 11 51 238 discloses a fine feeding adjustment device. Here, a change in the length of the crank takes place directly via two non-twistable pins, which are supported on an obliquely extending, axially displaceable control surface.
Neither the pins nor the control surfaces can be displaced in the axial direction in respect to each other.
No adjustment by means of eccentric bushings and pins, which can be pivoted in respect to each other, is provided here.
EP 0 480 879 A1 discloses a device for the continuous adjustment of the axial distributing movement of a distribution roller. By this, an eccentric bolt is displaced by means of an axially displaceable gear wheel.
SUMMARY OF THE INVENTION
The object of the present invention is directed to providing a crank mechanism with a length-adjustable crank.
In accordance with the present invention, this object is attained by structuring the crank as two concentric, relatively rotatable eccentrics. A drive mechanism is used to shift the outer eccentric with respect to the inner eccentric on which it is supported. The inner eccentric is a journal that is eccentrically supported on a drive gear wheel. The outer eccentric is an eccentric sleeve. Relative rotation between the two varies the stroke length of the crank mechanism which they define.
The advantages which can be obtained by the present invention reside in particular, in that a crank mechanism with few, and easily produced components is created by the arrangement of an axially displaceable driving mechanism, for example a pin, with which a pivotable driving mechanism, for example a helix-shaped groove, works together. An effective length of the crank of the crank mechanism can be easily adjusted.
REFERENCES:
patent: 3742850 (1973-07-01), Sedlak
patent: 3994222 (1976-11-01), Pullen
patent: 4513663 (1985-04-01), Hummel et al.
patent: 4711173 (1987-12-01), Emrich et al.
patent: 5158019 (1992-10-01), Miescher et al.
patent: 687918 (1940-01-01), None
patent: 1151238 (1963-07-01), None
patent: 1761389 (1971-06-01), None
patent: 2710135 B2 (1980-06-01), None
patent: 0189827 A2 (1986-06-01), None
patent: 0480879 A1 (1991-10-01), None
Asher Kimberly
Jones Tullar & Cooper PC
Koenig & Bauer Aktiengesellschaft
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