Method and device for cutting through a running web of material and for fixing the start of the following web section on a core
AssigneeWindmoeller & Hoelscher KG
InventorFritz Achelpohl
Life of this patent
Estimating the term…
Abstract
For the winding of a material web on a driven winding roll, it is cut through after the completed winding of a winding roll and the start of the following web is fastened on a winding core. The web is fed in the winding roll via a guide device, preferably consisting of a winding roller, and, after being cut through in a guide channel laid around a winding tube. In order to be able to wind the web with alternating outer sides into a winding roll, the web is fed, according to the desired outer side, from the left or from the right on winding in the winding tube. The winding tube is driven with a corresponding one of two opposite directions of rotation.
Claims24
An apparatus for carrying out a process for cutting through a material web running into a driven winding roll and for fastening a start of the following web on a winding tube, comprising:
- a guide device guiding the web into the winding roll, said guide device having,
- a knife for cutting through the web;
- a rotating element for redirection of the start of the web by the guide device onto the winding tube;
- and
- a guide channel for laying the web around the winding tube after the web has been cut by said knife;
- said guide device for winding the web from a left side or a right side of the winding tube for placement of either side of said web as an outer side on said winding tube, said winding tube being driven in a corresponding one of two opposite directions of rotation;
- and
- said winding tube being concentrically enclosed by a cylindrical housing forming the guide channel including an annular space, said housing being provided with an axial intake gap for the start of the web.
A separating apparatus for use in a web-winding apparatus with a winding roller and devices for initial winding and final winding of a continuously running material web onto a series of winding tubes, comprising:
- a separating apparatus disposed in an interior of the winding roller at a slot in a casing extending over an operating width, said separating device having a plurality of separating elements connected with one another in their movement which, to effect the separating process, are formed movably outwards in a radial direction through the casing of the winding roller and at least approximately parallel to an axis of the winding roller in an axial direction where a length of the movement of each separating element in the axial direction is chosen so that the material web is completely separated transversely.
An apparatus for the winding of a continuously running material web onto a series of winding tubes comprising a winding roller, at least one deflection roller, at least one separating device, and a device to wind a front end, formed on actuation of the separating device, of the running material web on a winding tube by a vacuum flow, said winding apparatus having, for bidirectional winding operation, a bell-shaped cover for initial winding, said cover enclosing the winding tube currently being initially wound onto and formed by two elongated shells, each of the shells having, near its respective movable ends, a vacuum slot extending at least approximately over a length of the winding tube, and the bell-shaped cover having devices in order to actuate one of the vacuum slots for initial winding, said separating apparatus being disposed in an interior of the winding roller.
An apparatus for carrying out a process for cutting through a material web running into a driven winding roll and for fastening a start of the following web on a winding tube, comprising:
- a guide device guiding the web into the winding roll, said guide device having,
- a cutting element for cutting through the web that includes a plurality of individual knives fastened at substantially equal intervals on a knife-carrying bar, said knife-carrying bar being guided in such a manner that it runs the knives out radially, moves them in the axial direction, and runs them in radially once again;
- a rotating element for redirection of the start of the web by the guide device onto the winding tube;
- and
- a guide channel for laying the web around the winding tube after the web has been cut by said cutting element;
- and
- said guide device for winding the web from a left side or a right side of the winding tube for placement of either side of said web as an outer side on said winding tube, said winding tube being driven in a corresponding one of two opposite directions of rotation.
Dependencies are inferred from the claim text.