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US 5,116,043 AGranted
Method of and apparatus for winding square folded sheet-like products on a rotary core
AssigneeGrapha-Holding AG
InventorsDaniel Jermann, Bruno Muller
Life of this patent
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AssigneeGrapha-Holding AG
InventorsDaniel Jermann, Bruno Muller
Estimating the term…
A stream of square folded sheets, wherein one marginal portion is thicker than the marginal portion which is parallel thereto, is fed into the nip of a rotary core and one or more flexible bands which are being convoluted onto the core whereby the sheets form a roll having convolutions which alternate with the convolutions of the band or bands. The thicker marginal portions of the sheets are fed in a direction at right angles to the axis of rotation of the core so that, in the absence of any undertaking to the contrary, the diameter of the respective end face of the roll would exceed the diameter of the other end face which is formed by the thinner marginal portions of the sheets. The development of such frustoconical roll is prevented by moving the single band or one of several bands close to that end face of the roll which is formed by the thicker marginal portions of the sheets and by maintaining the thus positioned band under requisite tension in order to compress the thicker marginal portions. The difference between the thicker and thinner marginal portions of the sheets can be monitored and the position(s) of one or more bands can be adjusted in automatic response to detection of the difference.
A method of storing successive products of a series of flexible sheet-like products, having substantially parallel first and second marginal portions the first of which is thicker than the second thereof, on a core--which is rotated about a predetermined axis--with assistance from at least one flexible band having an end which is affixed to the core so that the band is wound onto the rotating core, comprising the steps of conveying successive products of the series toward and against the rotating core so that the marginal portions are substantially normal to the axis and successive products are confined between the core and the band and are wound onto the core to form a roll of neighboring convolutions alternating with convolutions of the band and wherein the roll has a central symmetry plane which is normal to the axis and first and second end faces formed by the first and second marginal portions, respectively;
Apparatus for storing successive products of a series of flexible sheet-like products which have substantially parallel first and second marginal portions the first of which is thicker than the second thereof, comprising a core;
Dependencies are inferred from the claim text.