Cutting – Cutting motion of tool has component in direction of moving... – With means to initiate intermittent tool action
Reexamination Certificate
1999-08-19
2001-12-25
Rachuba, M. (Department: 3724)
Cutting
Cutting motion of tool has component in direction of moving...
With means to initiate intermittent tool action
C083S289000, C083S371000, C083S425400
Reexamination Certificate
active
06332388
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a longitudinal perforation forming apparatus for a form printing machine. More particularly, the invention relates to an arbitrarily positioned longitudinal perforation forming apparatus for forming a longitudinal perforation at an arbitrary position or a selected position in a continuous web paper printed by a form printing machine, depending upon a printed image.
2. Description of the Related Art
Since a form printing machine prints by means of a plate cylinder having a predetermined peripheral length, printing on a continuous web paper repeatedly makes a print per predetermined length in a feeding direction of the continuous web paper. In other words, printing using the plate cylinder makes repeated prints of the same image. Then, when a lateral or cross line perforation aligned in a perpendicular direction to a longitudinal direction of the continuous web paper is formed in a part of the printed image of such repeated prints of the same image, it is typical to perform a formation of the perforation by means of a perforation forming cylinder or a roulette cylinder having the same peripheral length as the plate cylinder in a similar manner to printing. In such conventional apparatus, the perforation formation is inherently performed sequentially and repeatedly for all printed images. Therefore, it has not been possible to form a longitudinal perforation only for a preliminarily selected image.
For example, in a longitudinal perforation forming apparatus composed of a roulette cylinder and a receptacle cylinder, a prior art apparatus which forms a longitudinal perforation for a part of the printed image is illustrated in
FIGS. 11 and 12
.
The apparatus shown in
FIGS. 11 and 12
is called a skip roulette apparatus. The skip roulette apparatus has the receptacle cylinder a on the peripheral surface of which ribbon steels b are attached at mutually spaced apart positions with a predetermined distance in axial direction. At positions corresponding to respective ribbon steels b, longitudinal roulette rollers c are provided and are supported by holders d. Rotating the holders d according to rotation of the receptacle cylinder a to depress the longitudinal perforation rollers c onto the ribbon steels b forms a longitudinal perforation in the web paper e.
In the foregoing conventional skip roulette apparatus, the longitudinal perforation is formed in a part of the printed image by attaching the ribbon steel corresponding to the length of the longitudinal perforation on the receptacle cylinder a having the same peripheral length of a plate cylinder. However, it has not been possible to selectively form the longitudinal perforation. Also, since the position of the longitudinal perforation is fixedly determined depending upon the position where the ribbon steel is attached, varying the position or interval is difficult. Furthermore, in order to vary the position of the longitudinal perforation in the longitudinal direction (traveling direction of the continuous web paper), it becomes necessary to loosen a sleeve f supporting the receptacle cylinder a to manually adjust the longitudinal position. Such adjustment is not easy. Furthermore, it is difficult to change the number of longitudinal perforations, similarly.
SUMMARY OF THE INVENTION
The present invention has been worked out in view of the problem set forth above. Therefore, it is an object of the present invention to provide an arbitrarily positioned longitudinal perforation forming apparatus which can arbitrarily form the longitudinal perforation at only a preliminarily selected image, and can easily vary a position of the longitudinal perforation in a width direction of a continuous web paper. Furthermore, the apparatus can vary positions and interval of a plurality of longitudinal perforations in the width direction of the continuous web paper and further vary the number of the perforations, and can vary the position of the longitudinal perforation in a longitudinal direction (traveling direction of the continuous web paper).
In order to accomplish the above-mentioned object, an arbitrarily positioned longitudinal perforation forming apparatus according to the present invention comprises a longitudinal roulette cylinder, a receptacle cylinder, a driver system, and edge receptacle, and a first control unit.
The longitudinal roulette cylinder is composed of a first rotary shaft arranged on one side of a continuous web paper and which rotates in a traveling direction of the continuous web paper. At least one disc-shaped longitudinal roulette edge is supported on the first rotary shaft as adjustably positioned in an axial direction of the first rotary shaft and locked in a rotating direction.
The receptacle cylinder is composed of a second rotary shaft arranged on the other side of the continuous web paper in a parallel relationship with the first rotary shaft and which rotates in the traveling direction of the continuous web paper. At least one disc-shaped edge receptacle plate is supported so as to be adjustably positioned in an axial direction of the second rotary shaft and locked in a rotating direction. The disc-shaped edge receptacle plate is provided with a projecting edge receptacle portion opposing the longitudinal roulette edge of the longitudinal perforation cylinder on its outer periphery. A longitudinal perforation is formed in the continuous web paper when the projecting edge receptacle portion opposes the longitudinal roulette edge.
A drive system drivers the first rotary shaft of the longitudinal roulette cylinder and the second rotary shaft of the receptacle cylinder in synchronism with the direction of travel of the continuous web paper. The edge receptacle plate switchover moving device engage the edge receptacle plate so as to move the edge receptacle plate in the axial direction. Finally, the first control unit controls the edge receptacle plate switchover moving device.
In addition to the construction set forth above, it is preferred that the apparatus further comprises a differential mechanism and a second control unit.
The differential mechanism is disposed in an element of the drive system to vary a position at which the longitudinal perforation is formed in the traveling direction of the continuous web paper in the continuous web paper by making rotations of the longitudinal roulette cylinder and the receptacle cylinder synchronous with the travel of the continuous web paper by varying rotation of a differential shaft thereof. The second control unit controls rotation of the differential shaft of the differential mechanism.
Also, in the construction set forth above, it is desirable that the edge receptacle plate switchover moving device comprises a feeding screw, a sleeve, a shifting member, and a switching drive source.
The feeding screw extends in parallel to the second rotary shaft, and the sleeve threadingly engages the feeding screw so that it is prevented from rotating. The shifting member is fixed to the sleeve and engaged with the edge receptacle plate in the axial direction, and the switching drive source drives the feeding screw in forward and reverse directions under control of the first control unit.
Furthermore, in the construction set forth above, the apparatus may further comprises a mark sensor. The mark sensor reads a mark printed on the continuous web paper and inputs a mark read signal to the first control unit. The first control unit is responsive to the mark read signal so as to drive the edge receptacle plate switchover moving device to perform the formation of the longitudinal perforation.
With the construction set forth above, under control of the first control unit, the edge receptacle plate switchover moving device drives the shifting member to move so as to switch the position of the edge receptacle plate between the aligned position, where at the position of the edge receptacle plate matches with the position of the longitudinal roulette edge in the axial direction, and a position
Izawa Hideo
Kishine Toshiaki
Yoshikawa Mikio
Miyakoshi Printing Machinery Co., Ltd.
Rachuba M.
Tran Kim Ngoc
Wenderoth , Lind & Ponack, L.L.P.
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