Abstract:
A rewinding machine for convolutley winding a web material onto a core to is disclosed. The rewinding machine comprises a first winding drum rotatable at a first peripheral velocity, a second winding drum opposed to the first winding drum and rotatable at a second peripheral velocity, and a core support for gripping opposing ends of the core. The core support grips opposing ends of the core during winding of the web material about the core. The core support has first and second rotatable pins each having corresponding first and second ends capable of insertion into a respective end of the core. The first rotatable pin has a channel that provides fluid communication between a source of positive pressure disposed external to the first rotatable pin and the second end of the first rotatable pin to provide positive pressure to the interior portion of the core.
Abstract:
A rewinding machine for convolutley winding a web material onto a core to is disclosed. The rewinding machine comprises a first winding drum rotatable at a first peripheral velocity, a second winding drum opposed to the first winding drum and rotatable at a second peripheral velocity, and a core support for gripping opposing ends of the core. The core support grips opposing ends of the core during winding of the web material about the core. The core support has first and second rotatable pins each having corresponding first and second ends capable of insertion into a respective end of the core. The first rotatable pin has a channel that provides fluid communication between a source of positive pressure disposed external to the first rotatable pin and the second end of the first rotatable pin to provide positive pressure to the interior portion of the core.
Abstract:
A method and combination for eliminating slack in one or more of a plurality of strands of web material being wound into coils on a take-up drum, where the strands have different thicknesses, include connecting a portion of each strand to the drum so that rotation of the drum will cause the strands simultaneously to wind onto the drum. The strands are wound onto the drum and a portion of each strand is connected to a previously wound portion of the same strand for forming a plurality of fixed diameter loops about the drum, the portion of each strand adjacent to the drum substantially conforming in size and shape to the outer surface of the drum. The portion of each strand connected to the drum is disconnected and the outer diameter of the drum is reduced an amount sufficient to cause the loops to slip relative to the drum when the drum is rotated and a predetermined tension is reached in the strands, the frictional force between the strands and drum causing the loops to rotate with the drum until said predetermined tension is reached.
Abstract:
A number of reel groups each consisting of two or more reels are axially arranged side by side on reel support shafts. A number of tapes equal to the number of reel groups are wound simultaneously, one on a corresponding reel of each reel group. When the tapes are fully wound up on the reels of the reel groups, the reel groups are axially shifted on the shafts to change reels. The axial movement of the reel groups may be made by axially sliding the reels on the shaft or by axially shifting the reels and the shaft together.
Abstract:
A winding apparatus for webs of photosensitive material has a core provided with a transverse slot and rotatably mounted on a fixed shaft in the housing of a cassette. The cassette contains a pivotable guide whose discharge end can register with the inlet of the slot in a predetermined angular position of the core so as to feed the leader of a web into the slot. The core is surrounded by a removable sleeve which can be slid onto the core only when the latter assumes the predetermined angular position and when an opening of the sleeve registers with the inlet of the slot. When the leader extends into the slot, the core is rotated by a worm drive so that the web is convoluted onto the sleeve and can be removed with the sleeve for transfer to another processing station. The housing of the cassette has a removable cover which can be attached to the shaft for the core only when the core is properly oriented relative to the guide and when the sleeve is properly applied onto the core.
Abstract:
Disclosed herein is equipment for receiving, for example, assemblies of which each comprises a windup mandrel and slit coils carried thereon as used in the operation of a duplex foilslitting and rewinding machine, removing the coils from the mandrel, and processing the coils into a compact package while retrieving the mandrel for use in further slitting and rewinding operations. The portion of the equipment of especial interest herein effects a change of coaxial spaced relationship of the coils on the windup mandrel to stacked or coaxial juxtaposed relationship. To accomplish such stacking, structure is provided for facilitating the removal of coil separating elements of the assembly which fit together about the main shaft of the mandrel, such as drive collars and various types of spacers.
Abstract:
A sheet product dispenser for dispensing sheet product from a roll of sheet product is provided. An example sheet product dispenser includes a housing defining an interior space for receiving a first roll of sheet product (170a, 170b) therein, a mandrel (150a, 150b) positioned within the interior space, and a spindle (100) positioned over at least a portion of the mandrel and configured to support the first roll of sheet product for rotation about the mandrel. The spindle comprises abase portion (102) and a nose portion (104) configured to translate relative to one another along a longitudinal axis of the mandrel (150a, 150b). At least a portion of the spindle is configured to translate relative to the mandrel from a first configuration to a second configuration to cause a remainder of the first roll of sheet product (170a, 170b) to deform and enable movement of a dispensing door (186) to enable access to a second roll of sheet product.
Abstract:
A slitter-winder for winding of pulp webs or corresponding webs with a thickness of at least 0.5 mm, in which the winder is a two-drum winder having two winding drums on support of which at least two pulp web rolls are wound. At least one of the winding drums is a nip acceptance winding drum (NAWD), that is a winding drum with a cover having a hardness of 40-80 Shore A and a thickness of 3-50 mm. The winding drums and a steel core or a shaft of the at least two pulp web rolls have parallel rotation axes and are in a rolling contact where the at least one winding drum is driven.