Winding – tensioning – or guiding – Unwinding – With supply coil replenishment
Reexamination Certificate
1999-06-02
2001-07-31
Jillions, John M. (Department: 3653)
Winding, tensioning, or guiding
Unwinding
With supply coil replenishment
C242S559400, C242S563000
Reexamination Certificate
active
06267320
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an unroll device with at least one unroll stand, comprising a machine frame, which has two bearing stands spaced apart; bearing supports, which are guided substantially horizontally movably on the bearing stands; shifting drives acting on the bearing supports; a supporting shaft, the ends of which are run on the bearing supports; lugs, which are guided on the supporting shaft non-rotatably relative thereto, but displaceably in their longitudinal direction; centering pivots for holding a reel, which are mounted on the lugs and define an unrolling axis; and at least one lifting drive coupled to the supporting shaft.
2. Background Art
Unroll devices of the generic type are known for instance from EP 0 629 574 B1. In this case the supporting shafts are guided via a stationary radial cam such that the reel unrolling axis, which is defined by the centering pivots, is moved in a vertical plane over a stationary rest taking up the paper reel on the ground so that paper reels of varying thickness, the center line of which differs correspondingly in height above the rest, can be seized reliably. In this known unroll device, the paper reel must be oriented on the rest, i.e. relative to the ground, such that the center line of the reel is parallel to the unrolling axis of the unroll device. Corresponding orientation of the center line of a paper reel takes place by the aid of a device as illustrated and described in U.S. Pat. No. 5,755,395.
U.S. Pat. No. 4,930,713 teaches another unroll device, in which the supporting shaft carrying the lugs is guided via eccentric cam plates. In this way, it is also possible to move the centering pivots of the lugs in a vertical plane so that paper reels of varying thickness can be seized reliably.
DE G 86 29 994 U1 teaches an unroll device in which the supporting shaft, which carries the lugs, is lodged in a parallel steering system so that the centering pivots are forcibly guided in a vertical plane.
SUMMARY OF THE INVENTION
It is an object of the invention to embody an unroll device of the generic type such that orientation of the reel to be picked up is not necessary prior to it being lifted by the unroll device.
According to the invention, this object is attained by the features wherein the supporting shaft is run on the bearing supports such that its central longitudinal axis is not only displaceable parallel to itself, but is also pivotal about a base position substantially in a horizontal plane; and wherein the shifting drives can be operated individually. Due to the fact that the supporting shaft and thus the unrolling axis are pivotal by some degrees not only parallel to themselves, but also relative to themselves in the horizontal plane, to which end the shifting drives of the bearing supports can be trigered independently from each other, i.e. due to the fact that the bearing supports of an unroll stand are movable relative to each other, the centering pivots of an unroll stand can be moved into a position in which the unrolling axis they define is in alignment with the center line of the paper reel lying before the device.
Further features, advantages and details of the invention will become apparent from the ensuing description of two exemplary embodiments, taken in conjunction with the drawing.
REFERENCES:
patent: 1869545 (1932-08-01), Crafts
patent: 3175779 (1965-03-01), Grobman et al.
patent: 4460135 (1984-07-01), Hirakawa et al.
patent: 4586673 (1986-05-01), Tokuno et al.
patent: 4895314 (1990-01-01), Thievessen
patent: 4930713 (1990-06-01), Sato et al.
patent: 5320296 (1994-06-01), Ozcariz et al.
patent: 5755395 (1998-05-01), Gnan
patent: 5863175 (1999-01-01), Trefz
patent: 86 29 994 (1987-11-01), None
patent: 40 08 897 (1991-09-01), None
patent: 42 24 309 (1994-01-01), None
patent: 0 387 365 (1990-09-01), None
patent: 0 629 574 (1994-12-01), None
patent: 0 700 854 (1996-03-01), None
patent: 1 600 070 (1981-10-01), None
BHS Corrugated Maschinen-und Anlagenbau GmbH
Browdy and Neimark
Jillions John M.
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