Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
1999-04-27
2001-01-23
Sells, James (Department: 1734)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C156S195000, C156S250000, C156S425000, C156S446000, C156S499000, C156S510000, C492S029000
Reexamination Certificate
active
06176956
ABSTRACT:
FIELD OF INVENTION
The present invention relates to a method and a device for the manufacture of paint rollers by winding a textile fabric onto a plastic tube along a spiral-shaped line.
In particular, the invention relates to an improved method by which a long tube with a wound-on band of textile fabric may be cut into paint rollers.
STATE OF THE ART
From DE-A1-35 44 640, a method for the manufacture of paint rollers is known, by which a textile fabric band is wound onto a plastic tube. The device for this purpose exhibits a winding mandrel, onto which the plastic tube is slipped. For winding on the textile band, an oblique guide is used, mounted on a slide, which can be displaceably controlled by means of drive chains. The device is equipped with an arrangement for heating the plastic tube so as to soften its surface in order to allow the textile band to be adhered directly to the material of the plastic tube by melting together with it.
In order for the method to be efficient, the winding of the textile band is performed over a long tube, which is subsequently cut into suitable lengths for use as paint rollers. The cutting is made in a separate machine, by a knife cutting through the fabric and the plastic tube. Cutting through the plastic tube is however energy-consuming and entails substantial wear of the knife and frequent exchanges thereof
The present invention solves the above-mentioned problem through the plastic tube being separated beforehand into a number of tube elements. The tube elements are mechanically held together on the mandrel during the winding operation. After the winding, the wound tube may be cut into lengths by cutting through the textile fabric only. One advantage is that the cutting may then be performed in the same machine without any risk of damaging the mandrel. As the knife cuts through the fabric only, this causes much less knife wear and is less energy-consuming.
SUMMARY OF THE INVENTION
The present invention thus provides a method for the manufacture of paint rollers by winding a textile fabric onto a plastic tube along a spiral-shaped line.
According to the invention, a number of tube elements, each having a length suitable for a paint roller, are slipped onto a revolving mandrel. The tube elements are clamped together so as to grip each other and be able to rotate with the mandrel. The mandrel is rotated at the same time as the fabric is wound on and attached to the tube elements, after which the fabric is cut at the joints between the tube elements.
Preferably, the tube elements have a toothing at their axial ends for mechanical connection between the tube elements, and with the mandrel.
The invention also relates to a device for performing the method, as well as to a tube element for the purpose.
The invention is described in detail in the appended claims.
REFERENCES:
patent: 4692975 (1987-09-01), Garcia
patent: 5137595 (1992-08-01), Garcia
patent: 5294276 (1994-03-01), Linn et al.
patent: 5614047 (1997-03-01), Garcia
patent: 3544640 (1986-07-01), None
patent: 0589305 (1994-03-01), None
Anza AB
Ladas & Parry
Sells James
LandOfFree
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