Advancing material of indeterminate length – With material-responsive control means – To regulate longitudinal movement of material
Patent
1990-01-22
1992-07-14
Stodola, Daniel P.
Advancing material of indeterminate length
With material-responsive control means
To regulate longitudinal movement of material
101248, 226 40, B41F 1302
Patent
active
051295687
ABSTRACT:
An off-line web finishing system performs plural functions on a pre-printed and rewound web at a series of pieces of equipment arranged in a line. Tension in the web is set at a variable infeed at a constant value that is sufficient to facilitate handling of the web. A common web-transport system drives all draw rolls in the line in unison, at the same speed, and without slippage between the web and the rolls. In the preferred form, a second drive line rotates in unison the function cylinders of pieces of equipment that are registration sensitive. The second line is driven by a main line shaft of the web transport system via a variable transmission that is adjusted in response to at least one optical scanner that senses misregistrations between the printed pattern on the web and the function cylinders. The registration sensitive function cylinders operate on the web only intermittently. Each function cylinder preferably has an associated scanner that operates a variable transmission between the second line and the associated function cylinder to further control the registration of the equipment to the web.
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Fokos Robert
Salvucci Orfeo J.
Williams Robert M.
Bittman Mitchell D.
Bowen P.
Manus Peter J.
Sequa Corporation
Stodola Daniel P.
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