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Rewinding Machine, Method for Producing Logs of Web Material

a web material and winding machine technology, applied in the direction of thin material processing, article delivery, transportation and packaging, etc., can solve the problems of web material tearing along the perforation line, high air pressure, special configuration and other problems, to achieve the effect of ensuring a high level of production flexibility, efficient and economical reliability

Inactive Publication Date: 2009-12-10
FABIO PERINI SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0021]The object of the invention is to produce a winding method and a rewinding machine which are particularly efficient, economical and reliable and which guarantee a high level of production flexibility.

Problems solved by technology

The difference in speed between the winding roller and the web material on the one hand and the moving member on the other causes tearing of the web material along a perforation line.
This configuration is particular complex and difficult to produce, and not devoid of defects.
Moreover, very high air pressures are required, as the jet of air delivered from the nozzles must pass through the perforated wall of the winding roller rotating at high speed.
This construction is complex and not very efficient.
Moreover, in both embodiments the winding roller cannot have a smooth and regular surface, but must be provided with holes or annular grooves, which damage the web material during winding, decreasing the quality of the finished product.

Method used

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  • Rewinding Machine, Method for Producing Logs of Web Material
  • Rewinding Machine, Method for Producing Logs of Web Material
  • Rewinding Machine, Method for Producing Logs of Web Material

Examples

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Embodiment Construction

[0048]In the embodiment illustrated in FIGS. 1A, 1B and 1C, the winding machine comprises a winding cradle formed of three winding rollers and more specifically: a first winding roller 1, a second winding roller 2 and a third winding roller 3. The three rollers 1, 2, 3 rotate about axes parallel to one another and with peripheral speeds which—during the winding cycle—are substantially the same as one another, while they can vary, in a way known per se, at the end of winding to unload the completed log and / or to insert the new core, around which winding of the subsequent log has started, through a nip defined between the winding rollers 1 and 2.

[0049]The winding roller 3 is supported on a pair of oscillating arms 7, hinged about an oscillation axis 7A. The oscillating movement allows increase in the roll R being formed inside the winding cradle 1, 2, 3 and unloading of the completed roll along a chute 9.

[0050]The web material to be wound to form the logs R is indicated with N. It is ...

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Abstract

A rewinding machine including a winding system and a feed path for a web material towards the winding system is described. Positioned along the feed path is at least one air jet severing member to cause severing of the web material after winding of each log has terminated.

Description

TECHNICAL FIELD[0001]The present invention relates to a rewinding machine for winding a web material to form logs for producing, for example but not exclusively, small rolls of toilet paper, kitchen towels and the like. More specifically, but not exclusively, the invention relates to a “peripheral” rewinding machine, i.e. in which logs are formed by winding the web material in a winding cradle composed of winding members in contact with the outer surface of the log. The invention also relates to a winding method and more specifically, although not exclusively, a “peripheral” winding method.STATE OF THE ART[0002]To produce logs of paper, tissue paper or other web materials, rewinding machines are used to which the material to be wound is fed, and which produce logs with a pre-established quantity of wound material. The web material is typically fed from unwinders, i.e. machines that unwind one or more reels of large diameter coming, for example, from a papermill.[0003]The logs can be...

Claims

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Application Information

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IPC IPC(8): B65H19/26B65H18/08B65H19/28
CPCB65H19/2269B65H19/267B65H2408/235B65H2301/51533B65H2301/41425B65H19/26B65H19/30
Inventor MORELLI, ROBERTOGELLI, MAURO
Owner FABIO PERINI SPA
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