Claims
- 1. A clamping apparatus for fixing a plate on a plate cylinder of a printing machine comprising:
- a first clamping part mounted on the plate cylinder for fixing a first end of the plate, and
- a second clamping part mounted on the plate cylinder for fixing a second end of the plate, the plate being disposed around a surface of the plate cylinder and the first end thereof being fixed by the first clamping part,
- wherein the second clamping part includes a holding part which holds the second end of the plate such that said holding part includes a flange part, a pushing part which pushes the flange part of the holding part so as to move the holding part in a tension applying direction, and a pushing force limitation part which limits a pushing force of the pushing part on the holding part at a first position thereof and the pushing force limitation part being actuatable to a second position where the pushing force of the pushing part on the holding part is not limited by the pushing force limitation part,
- and wherein the plate is in a loosened condition around the surface of the plate cylinder when the pushing force limitation part is at the first position thereof,
- and wherein the plate is in a tensioned condition around the surface of the plate cylinder when the pushing force limitation part is at the second position thereof.
- 2. A clamping apparatus for fixing a plate on a plate cylinder of a printing machine in accordance with claim 1, wherein the pushing part comprises a plurality of springs, each of said springs being expandable and contractable in a direction perpendicular to a shaft of the plate cylinder, and said springs being spaced from each other along a direction parallel to the shaft of the plate cylinder.
- 3. A clamping apparatus for fixing a plate on a plate cylinder of a printing machine in accordance with claim 1, further comprising:
- an auxiliary pushing part in contact with the holding part and pushing the holding part in a direction opposite the tension applying direction.
- 4. A clamping apparatus for fixing a plate on a plate cylinder of a printing machine in accordance with claim 1, further comprising tension adjusting means provided on the holding part, and wherein the holding part is moveable and adjustable in the tension applying direction by the tension adjusting means.
- 5. A clamping apparatus for fixing a plate on a plate cylinder of a printing machine in accordance with claim 4, wherein a plurality of said tension adjusting means are provided on the holding part, the plurality of tension adjusting means being spaced from each other along an axis parallel to a shaft of the plate cylinder, and wherein each of the tension adjusting means independently moves and adjusts the holding part.
- 6. A clamping apparatus for fixing a plate on a plate cylinder of a printing machine in accordance with claim 1,
- wherein the pushing force limitation part is rotatable between the first and second positions about an axis that is substantially parallel with a shaft of the plate cylinder,
- and wherein the pushing force limitation part has an external circumferential surface and a flat surface,
- and wherein the circumferential surface contacts the pushing part when the pushing force limitation part is at the first position,
- and wherein the flat surface faces the pushing part at the second position of the pushing force limitation part.
- 7. A clamping apparatus for fixing a plate on a plate cylinder of a printing machine in accordance with claim 6, wherein the pushing part comprises a plurality of springs, each of said springs being expandable and contractable in a direction perpendicular to the shaft of the plate cylinder, and said springs being spaced from each other along a direction parallel to the shaft of the plate cylinder.
- 8. A clamping apparatus for fixing a plate on a plate cylinder of a printing machine in accordance with claim 6, further comprising:
- an auxiliary pushing part in contact with the holding part and pushing the holding part in a direction opposite the tension applying direction.
- 9. A clamping apparatus for fixing a plate on a plate cylinder of a printing machine in accordance with claim 6, further comprising a tension adjusting means provided on the holding part, and wherein the holding part is moveable and adjustable in the tension applying direction by the tension adjusting means.
- 10. A clamping apparatus for fixing a plate on a plate cylinder of a printing machine in accordance with claim 9, wherein a plurality of said tension adjusting means are provided on the holding part, the plurality of tension adjusting means being spaced from each other along an axis parallel to the shaft of the plate cylinder, and wherein each of the tension adjusting means independently moves and adjusts the holding part.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8-006119 |
Jan 1996 |
JPX |
|
Parent Case Info
Cross-Reference to Related Applications
This application is based on application Ser. No. Hei8-6119 filed on Jan. 17, 1996 in Japan, the content of which is incorporated hereinto by reference.
US Referenced Citations (9)
Foreign Referenced Citations (2)
Number |
Date |
Country |
4-70145 |
Nov 1992 |
JPX |
6-5165 |
Feb 1994 |
JPX |