Winding – tensioning – or guiding – Convolute winding of material – Simultaneous winding
Patent
1999-10-07
2000-10-10
Nguyen, John Q.
Winding, tensioning, or guiding
Convolute winding of material
Simultaneous winding
242542, B65H 1808
Patent
active
061293040
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
This invention relates to a machine for producing reels of wound weblike material, for example paper, tissue paper, nonwovens and similar products.
More specifically, this invention relates to a machine for simultaneously producing a plurality of reels on a corresponding plurality of tubular winding cores arranged in axial alignment in a winding cradle formed by rotating cylinders.
The invention also relates to a method for producing a plurality of reels of weblike material wound on tubular cores.
2. Background Art
In the paper converting industry it is frequently necessary to produce relatively large diameter reels of paper wound on tubular winding cores. This requirement occurs, for example, when manufacturing reels of toilet paper, paper towels and the like for industrial use or public facilities, that is to say where there is a need for reels containing a large quantity of wound paper.
Many different types of machine, in which one or more tubular winding cores are laid in a cradle formed by two rotating winding rolls, have been designed for the production of these reels. GB-A-2,050,317 discloses a machine that produces one reel at a time on a tubular core. The core is placed in a lateral jaw which, at the start of the winding cycle, places the core (to which a band of adhesive has already been applied) in the winding cradle.
A similar machine is disclosed in U.S. Pat. No. 4,456,190.
U.S. Pat. No. 3,727,854 discloses a machine in which the winding cores are inserted in sequence in the winding cradle by a chain hoist and a pivoting insertion means.
In some cases two or more cores are laid in the winding cradle in axial alignment. The weblike material is then slit lengthwise on its way to the winding rolls. The result is simultaneous winding of two or more reels in parallel. This makes it possible to wind reels of considerable diameter and with an axial dimension equal to the final dimension which it is desired to produce, thereby avoiding the necessity of cutting the reels after winding. Such a machine is produced by the company Jagenberg Aktiengesellschaft, Dusseldorf, Germany, and is known by the name "Vari-Dur".
Other examples of machines in which winding takes place simultaneously on two or more axially aligned tubular cores are disclosed in Japanese Utility Model Application JP 54-4806 and in U.S. Pat. No. 4,157,794.
In these machines the tubular cores are supplied already in the axial dimension on which winding is carried out.
A production machine belonging to the present proprietor, by the name "Rodumat", also has a slitting station in which a tube of board or other suitable material is slit into a plurality of tubular cores of reduced length, which are then inserted into the winding cradle. In this machine a mandrel is inserted into the tube in the slitting station to serve as a backing for the slitting tools, after which the mandrel, now inside the tubular cores generated by the slitting of the tube is inserted into the winding zone for the formation of the reels of weblike material. After winding, the mandrel is withdrawn and sent via a recycling path to the slitting station. With these machines it is therefore necessary to have a large number of mandrels, two systems for inserting and withdrawing the mandrel at two different points of the machine and a mandrel recycling path.
OBJECTS OF THE INVENTION
It is an object of this invention to provide a rewinder machine for simultaneously producing a plurality of reels on axially aligned cores that is highly compact and efficient.
It is also an object of the invention to provide a rewinder machine that also comprises, in line with the feed means of the weblike material, means for the precise and efficient slitting of tubes to produce tubular cores of the desired length for winding.
It is yet another object of the invention to provide a machine in which it is possible quickly and flexibly to modify the length of the individual tubular cores to suit production needs.
SUMMARY OF THE INVENTION
These and other objects
REFERENCES:
patent: 4422588 (1983-12-01), Nowisch
patent: 4695006 (1987-09-01), Pool
Agfa-Gevaert N.V.
Nguyen John Q.
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