B - Operations – Transporting – 41 – F
Patent
B - Operations, Transporting
41
F
101/51
B41F 5/02 (2006.01) B41F 21/10 (2006.01)
Patent
CA 1135561
- 1 - ABSTRACT DUPLICATING MACHINE WITH DUPLEXING CAPABILITY A system for duplicating images on copy sheets uti- lizing an impression cylinder. The particular purpose is to efficiently achieve formation of an image on both sides of each copy sheet while allowing for use of sheets of different sizes, and also to achieve single sided copy where the sheets are very long. To achieve this, the system provides for transfer of an image to one side of each sheet (12), and the sheet may then be reversed to locate the sheet on the impres- sion cylinder (16), trailing edge first. The reversing is in synchronism with a second image whereby this second image may be transferred to the opposite side of each sheet. The im- pression cylinder is provided with a first gripper (20) for engaging the leading edge of each sheet when the sheet is first fed to the impression cylinder. A second gripper (22) is provided on the impression cylinder for engaging the trail- ing edge of each sheet, and this second gripper turns around to achieve the reversing action after application of the first image. External mounting means (30, 34) are provided for the first gripper. Means (111, 102) operate to permit relative movement of the impression cylinder and first gripper whereby the relative positions of the grippers can be changed so that different size sheets can be duplexed. Furthermore, very long sheets can be imaged on one side with this arrangement by uti- lizing the second gripper to engage the leading edge of each sheet and by moving the externally mounted gripper to an out- of-the-way position.
326803
Dick (a.b.) Company
Smart & Biggar
LandOfFree
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