FOIL UNWINDING DEVICE FOR STAMPING MACHINE
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United States of America Patent
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Issued Date -
Dec 12, 2013
app pub date -
Feb 15, 2012
filing date -
Feb 28, 2011
priority date (Note) -
Abandoned
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Abstract
A device 100 for unwinding foil to accumulate at least one stamping foil 20 upstream of an advance shaft 50. The device 100 includes two series 110, 120 of diverting elements 111, 121. One series is mobile relative to the other to define a foil circulation path of variable length. The mobile series moves between a close together position and a far apart position as the foil advances. A movement device 130 moves the mobile elements 110 as a function of a variable rotation speed difference between an advance shaft 50 of the foil that turns at variable speed and a rotary drive member 131 that turns at a constant speed substantially at the average rotation speed of the advance shaft 50. A transmission between the shaft 50 and the member 131 enables them to rotate at variable and constant speeds.
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