Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1992-02-21
1994-01-18
Will, Thomas B.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 586, 242 66, B65H 1918
Patent
active
052794717
DESCRIPTION:
BRIEF SUMMARY
The present invention refers to a device for splicing the trailing end or the cut off end of a rolled up web material with the starting end of another roll of web material, whereby web material pulled out from a first roll of web by means of a roller is transmittable to a starting end of a second material roll web material which is situated on a splicing table, where these are connected to each other.
BACKGROUND OF THE INVENTION
Web materials, e.g. paper, plastic films, foils, fabric and so on, are in great extent used as semi-manufacture for further processing or use for example as packing material. The web material is delivered in rolls and normally is placed in a roll stand, from which the material is guided into a converting machine. The starting end of the web material has to be thread through various stations which is both time consuming and a tedious work, which moreover has to be repeated every time a new roll of web material is placed in the roll stand.
OBJECTS OF THE INVENTION AND MOST IMPORTANT FEATURES
The object of the invention is to provide a device which makes it possible to change a roll of material without breaking the web of material to the converting machine. Moreover the device must be simple to handle and inexpensive to procure and in maintenance. A change of rolls should also be possible to be carried out by unskilled personnel. These tasks have been solved by during rolling off web material from the roll of material, inside the web and near the nip between the material roll and a storage roll for this, said roller is provided, which is pivotally hinged in spring loaded arm or the like, provided to exert a fit-up pressure on the web material and at break of the web or termination of the web swing the roller in a direction off the material roll, whereby the end portion of the web material is carried and transported to the splicing table, that the splicing table is provided between two stores for each material roll, and that in the second store is provided a unit for lifting and moving of the second material roll to the first store.
SPECIFICATION OF THE DRAWINGS
The invention will be described below with reference to accompanying drawings which show an embodiment thereof.
FIG. 1 shows diagrammatically an elevational view of a roll changing device according to the invention.
FIG. 2 shows a part of the device according to FIG. 1 during the splicing phase.
FIG. 3 is a view analogous to that of FIG. 2 after terminated splicing.
FIG. 4 shows a view analogous to that of FIG. 1 of the device during roll change in progress.
FIG. 5 shows a section through a roller in a device.
SPECIFICATION OF AN EMBODIMENT
The device according to the invention comprises two roll stores 11 and 12, the one of which in the drawing the left roll store 11 is the permanent store of the device, while the right store 12 in the drawing is a temporary store. Both stores are provided on mainly the same height and both each comprise a store 13 and 14 respectively to each support a roll of material 15 and 16 respectively. The store 13 comprises two carrier rolls 17 and 18 arranged in parallel and separated from each other, of which the carrier roll 17 is a motor-driven feeding roll for uncoiling of web material winded on the roll 15, such as paper, film, foils, fabric etc. Concentrically on the shaft of the support roll 18 an arm 19 is mounted on bearings, which arm at its free end supports a roller 20, which is freely rotatably pivoted in the arm. This is spring loaded or operates under influence of a pivot cylinder, which seeks to turn the arm in a direction towards a splicing table 22, which forms a part of a transport path 23, which connects the ordinary roll store with the temporary roll store 12. In the roll store 11 a retainer apparatus 24 is included in the form of a pneumatic piston cylinder, which at the end of uncoiling of the web material 25 from the material roll 15 locks this versus uplifting from the store 13. The retainer apparatus 24 is somewhat inclined in relation to the vertical plane, such
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