Apparatus for imprinting an unmarked foil
First Claim
1. An apparatus for imprinting an unmarked foil with images which are arranged within sections of the foil of a predetermined length, comprising a printing device through which said foil moves continuously and in which images are imprinted centered on said foil sections, a transport device receiving said foil for transporting said foil in steps of said predetermined length, a cutting device arranged adjacent said transport device for cutting said foil into said sections of said predetermined length, a control unit, a buffer arrangement having an entrance and an exit and being disposed between said printing device and said transport device and including a first foil motion sensor at the exit of said buffer arrangement and a foil length sensor providing a signal to said control unit when the length of the foil between its end in the cutting device and the printing device is a predetermined multiple of said predetermined length, said first foil motion sensor at the exit of said buffer arrangement generating a varying foil motion signal which depends on the discontinuous motion of said transport device which signal is averaged in said control unit to represent the average speed with which said foil leaves said buffer arrangement, and the averaged signal is applied to said printing device so as to operate said printing device at the same average speed at which the foil leaves the buffer arrangement.
2 Assignments
0 Petitions
Accused Products
Abstract
In an apparatus for imprinting an unmarked foil with images which are to be arranged within sections of the foil of a predetermined length L, including a printing device, a foil section transport device for moving the foil stepwise in sections of the length L, a cutting device for cutting the foil into the sections and a foil buffer arrangement accommodating a varying length of the foil between the printing device and the transport device, a foil motion sensor is arranged at the exit of the buffer arrangement for sensing the foil movement out of the buffer arrangement and controlling accordingly the speed of the printing device and a foil length sensor is arranged in the buffer arrangement and providing a print initiation signal when the foil length between the end of the foil in the cutting device and the printing device is a predetermined multiple of the foil section length L.
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Citations
6 Claims
- 1. An apparatus for imprinting an unmarked foil with images which are arranged within sections of the foil of a predetermined length, comprising a printing device through which said foil moves continuously and in which images are imprinted centered on said foil sections, a transport device receiving said foil for transporting said foil in steps of said predetermined length, a cutting device arranged adjacent said transport device for cutting said foil into said sections of said predetermined length, a control unit, a buffer arrangement having an entrance and an exit and being disposed between said printing device and said transport device and including a first foil motion sensor at the exit of said buffer arrangement and a foil length sensor providing a signal to said control unit when the length of the foil between its end in the cutting device and the printing device is a predetermined multiple of said predetermined length, said first foil motion sensor at the exit of said buffer arrangement generating a varying foil motion signal which depends on the discontinuous motion of said transport device which signal is averaged in said control unit to represent the average speed with which said foil leaves said buffer arrangement, and the averaged signal is applied to said printing device so as to operate said printing device at the same average speed at which the foil leaves the buffer arrangement.
Specification