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US 3,995,551 AGranted
Web tensioning and feeding apparatus
AssigneeMitter & Co.
InventorMathias Mitter
Life of this patent
Estimating the term…
Abstract
A web is guided onto a movable support, such as a printing blanket, and the web and the support are advanced together in a common direction, but at differential speeds so that the web will be subjected to tensioning. Onto the thus supported and tensioned web, a print is then applied. The invention discloses an apparatus for carrying out the above sequence.
Claims25
In a web printing apparatus, a combination comprising a movable printing blanket;
- first means for advancing said printing blanket at a first speed and in a predetermined direction;
- second means for advancing said web in said direction at a second speed which is slower than said first speed, including a web feed roller, a drive for rotating said feed roller, and a friction-type slip coupling interposed between said drive and said feed roller and formed with a groove and with an annulus of gear teeth having a portion which extends into said groove;
- guide means, including a pair of guide rollers extending along the periphery of said feed roller so that the web travels about said periphery intermediate the same and said guide rollers, for guiding said web directly onto said printing blanket and retarding it against acceleration to said first speed, so that the web becomes tensioned due to its frictional engagement with the advancing printing blanket and the differential between said first and second speeds;
- and printing means for printing onto said web which is supported on said printing blanket.
1 more element
In a web printing apparatus, a combination comprising a movable printing blanket;
- first advancing means for advancing said printing blanket at a first speed and in a predetermined direction;
- second advancing means for advancing said web onto said printing blanket at a second speed which is slower than said first speed;
- combined guide means and means for preventing said web from being accelerated to said first speed by said printing blanket and for guiding said web directly onto the advancing printing blanket to be supported on the same in substantial surface to surface contact so that the web is tensioned due to the slippage caused by the differential between said speeds and the frictional engagement of said web with the printing blanket;
- and printing means for printing onto said web which is supported on said printing blanket.
1 more element
Dependencies are inferred from the claim text.