Winding – tensioning – or guiding – Unwinding – With drive mechanism
Reexamination Certificate
2001-12-06
2004-02-10
Rivera, William A. (Department: 3653)
Winding, tensioning, or guiding
Unwinding
With drive mechanism
Reexamination Certificate
active
06688548
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention refers generally to a paper roll driving apparatus, and more particularly to a paper roll driving apparatus for use in a paper roll feeding apparatus that supports a plurality of paper rolls, continuously feeds a paper web by sequentially splicing paper rolls as the paper web is consumed in the course of printing operation, and is adapted to feed paper rolls of different widths; the paper roll driving unit for driving and rotating a new paper roll supported at a paper roll splicing position at which a paper roll is spliced to the paper web.
2. Description of the Related Art
Examples of paper roll driving apparatuses for driving and rotating a paper roll supported in a paper roll feeding apparatus that supports a plurality of paper rolls and continuously feed a paper web by sequentially splicing new paper rolls to the paper web as the paper web is consumed include the two apparatuses disclosed in Japanese Published Examined Patent Application No. Sho-63(1988)-48785 and the one disclosed in Japanese Published Examined Patent Application No. Hei-6(1994)-78136.
The first apparatus disclosed in Japanese Published Examined Patent Application No. Sho-63(1988)-48785 comprises a paper roll supporting device that can support both sides of a paper roll via supporting members having a driven accelerating roller (or a driven accelerating gear) and is supported by a rotating shaft movably along with the rotating shaft and rotatably together with the rotating shaft, a rack having a paper roll driving motor mounted thereon; the rack being supported by a guide rod and a rack shaft, both provided in parallel with the rotating shaft; adapted so that the rack can be moved along the guide rod and the rack shaft by rotating by an operating handle a pinion meshed with a rack on the rack shaft; and a new paper roll accelerating device comprising an arm having at the free end thereof a driving accelerating roller (or a driving accelerating gear) that is adapted so that the arm can pivot around the axial center of the shaft thereof at a predetermined angle, and an air cylinder for pivoting the arm at a predetermined angle; the first paper roll driving apparatus being adapted to drive the paper roll via the supporting members by causing the rack to move along the guide rod and the rack shaft by rotating the pinion by the operating handle while supporting the paper roll by causing the paper roll supporting device to move along the rotating shaft in accordance with the width and the loading position of the paper roll, and operating the new paper roll accelerating device by matching the position of the new paper roll accelerating device with the position of the driven accelerating roller (or driven accelerating gear) that has been moved as a result of the movement of the paper roll supporting device and bringing the driving accelerating roller (or driving accelerating gear) and the driven accelerating roller (or driven accelerating gear) into contact (or into mesh) with each other.
The second apparatus disclosed in Japanese Published Examined Patent Application No. Sho-63(1988)-48785 comprises a paper roll supporting device supported by the rotating shaft thereof rotatably along with the rotating shaft and movably in the axial direction of the rotating shaft for supporting a paper roll via supporting members, a rack mounted on the paper roll supporting device in such a manner as to be rotatable around the rotating shaft center, an attitude holding means for holding the rack in a predetermined attitude by preventing the rack from rotating together with the paper roll supporting device, and a new paper roll accelerating device for driving and rotating the paper roll by causing a driven accelerating roller mounted on a supporting member to rotate by a driving accelerating roller rotated by a variable speed control motor (paper roll driving motor) mounted on the rack; the second apparatus being adapted to rotate the paper roll via the supporting members by supporting the paper roll by causing the paper roll supporting device to move along the rotating shaft in accordance with the width and the loading position of the paper roll, and causing the new paper roll accelerating device mounted on the paper roll supporting device via the rack to move along with the paper roll supporting device without changing the relative positions of the driving accelerating roller and the driven accelerating roller mounted on the supporting member and to operate at the position after being moved by bringing the driving accelerating roller (or driving accelerating gear) and the driven accelerating roller (or driven accelerating gear) into contact (or into mesh) with each other.
An apparatus disclosed in Japanese Published Examined Patent Application No. Hei-6(1994)-78136 comprises a drive source mounted on the outside of a frame, a paper roll support supported by a rotating shaft rotatably together with the rotating shaft; the paper roll support adapted so as to support both sides of a paper roll via a supporting member having a toothed pulley and move along a rotating shaft, and a paper roll driving mechanism comprising a sub frame supported by a guide lever provided in parallel with the rotating shaft in such a manner as to move along the guide lever by the telescopic motion of the rod of a hydraulic cylinder provided in parallel with the guide lever, a driving shaft connected to the sub frame in parallel with the rotating shaft and rotatably, while passing through one of the sub frame and the frame, in such a manner as to be rotated by the drive source, an arm provided on the driving shaft in such a manner as to pivot around the driving shaft center and having a double-side toothed timing belt driven by the drive source via the driving shaft provided between a driving-side toothed pulley provided on the driving shaft and a pivoting-side toothed pulley provided on the pivoting side, and a hydraulic cylinder for pivoting the arm, the apparatus adapted to support a paper roll by causing the paper roll support to move along the rotating shaft in accordance with the width of the paper roll and to move the position of the paper roll driving mechanism in accordance with the movement of the paper roll support until the position of the paper roll support agrees with the position of the toothed pulley provided on the support member by causing the sub frame to move along the guide lever by the telescopic motion of the rod of the hydraulic cylinder, so that the paper roll is caused to rotate via the support member by operating the paper roll driving mechanism by engaging the double-face toothed timing belt with the toothed pulley provided on the support member.
The first apparatus disclosed in Japanese Published Examined Patent Application No. Sho-63(1988)-48785 had a problem as mentioned in that document. That is, as the paper roll supporting device is caused to move along the rotating shaft to load a new paper roll having a different paper width, the driven accelerating roller mounted on the paper roll supporting device via the supporting member is also caused to move. For this reason, the rack, the paper roll driving motor mounted on the rack and the new paper roll accelerating device including the driving accelerating roller have had to be moved to the position of the driven accelerating roller mounted on the paper roll supporting device via the supporting member. This moving operation, however, has had to be carried out manually by an operator, requiring a lot of time in printing preparation. Alignment of the driving accelerating roller and the driven accelerating roller has also been troublesome, and a large misalignment could cause a slip of the driving accelerating roller or a damage to it, causing a trouble in paper roll splicing, adversely affecting printing operation.
The second apparatus disclosed in Japanese Published Examined Patent Application No. Sho-63(1988)-48785 was conceived to overcome the aforementioned problem with the first apparatus. In the
McGlew and Tuttle , P.C.
Rivera William A.
Tokyo Kikai Seisakusho Ltd.
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