GB2148452A

GB2148452A - Roller

Info

Publication number: GB2148452A
Application number: GB08327897A
Authority: GB
Inventors: Robert Michael George Fielding
Original assignee: Dudley Industries Ltd
Current assignee: Dudley Industries Ltd
Priority date: 1983-10-18
Filing date: 1983-10-18
Publication date: 1985-05-30
Also published as: EP0138595A2; GB8327897D0; EP0138595A3

Abstract

A roller for a roller towel dispenser mechanism has a frictional coating containing carborundum grit bonded to its surface by means of a varnish or adhesive. A varnish or adhesive coating is first sprayed on the roller which is then coated with the grit and a further coating of varnish or adhesive, the whole arrangement then being cured.

Description

1

GB2 148 452A

1

SPECIFICATION Roller

5 The present invention relates to a roller and more particularly to a roller for a roller towel dispenser mechanism. In such mechanisms a towel is arranged to pass between two rollers and to be moved by means of a mechanism 10 for rotating one or both of the rollers. To provide a driving engagement between the towel and the surfaces of the rollers, it is known to provide a frictional covering for the roller surfaces by bonding thereto a pre-cut, 15 waterproof, paper-backed emery strip by means of a solvent-based or other adhesive. The strip is wound spirally onto the roller.

A disadvantage of the above arrangement is that the quality of and, in particular, the 20 degree of friction provided by commercially-available emery strips is variable. Accordingly some emery strips do not provide a satisfactory grip on the towel. In addition a problem arises in applying waterproof, paper backed 25 emery strips in that if these are not very well coated, the corners can start to lift, thereby necessitating rejection in the field.

The present invention seeks to overcome or reduce at least one of the above problems. 30 According to a first aspect of the present invention there is provided a method of providing a roller with a frictional coating, comprising coating the roller with an adhesive or varnish material and then applying a coating 35 of particulate material.

Preferably, a further coating of an adhesive or varnish material is then applied, and the coating is cured. Preferred materials are a two part epoxy varnish and a carborundum grit. 40 According to a second aspect of the present invention there is provided a roller having a frictional coating comprising a particulate material bonded to the surface of the roller by means of an adhesive or varnish material. 45 The roller is preferably for use in a roller towel dispenser mechanism.

A preferred embodiment of the presemt invention will now be described by way of example only.

50 In accorance with this embodiment a carborundum grit is bonded directly to the surface of a plastics or steel roller by the following method.

1. The roller is spray coated with a two 55 part epoxy varnish of desired consistency.

2. The roller is then coated with carborundum grit by passing through a fluidised bed, spraying the grit, rolling the roller into a tray of grit, or other means until the varnish coat-

60 ing is saturated with grit. The particle size of the grit is selected in accordance with the requirements of the particular application.

3. A final sealing of varnish (two part epoxy) of thinner consistency than the first is

65 sprayed over the carborundum coating.

4. The epoxy varnish with grit sealed in is then either cured at room temperature for 24 hours or at 60°C for one hour, or at such temperature and for a particular length of time

70 to ensure complete permanent (under normal atmospheric conditions) holding to the roller.

The above-described embodiment provides a roller with a coating which can firmly drive a towel engaging its surface. In addition the 75 frictional properties of the coated roller are more consistent than with conventional frictional rollers.

The coating may be applied to the driving and/or take-up rollers of a towel dispenser 80 mechanism, and can be applied to one or both rollers of each pair. Although the use of a two part epoxy has been disclosed, any suitable varnish or adhesive may be used and different materials may be used for the initial 85 and final coatings. Moreover any suitable grit or other particulate material may be used as well as or in addition to carborundum grit. The preferred size used is 60 grit, but the range can be from 40 to 80. The roller may 90 be used to drive webs or sheets of other materials, including paper, in a wide range of applications.

Claims

95 1. A method of providing a roller with a frictional coating comprising coating the roller with an adhesive or varnish material and then applying a coating of particulate material.
2. A method according to claim 1,

100 wherein the roller is then subjected to a further coating of adhesive or varnish material.
3. A method according to claim 1 or 2, wherein the coatings are then cured.

105
4. A method according to any preceding claim, wherein the varnish material comprises a two part epoxy varnish.
5. A method according to any preceding claim, wherein the particulate material com-

110 prises carborundum grit.
6. A method according to claim 5 wherein the grit size is in the range 40 to 80.
7. A method of providing a roller with a frictional coating substantially as herein de-

115 scribed.
8. A roller having a frictional coating comprising a particulate material bonded to the surface of the roller by means or an adhesive or varnish material.

120
9. A roller substantially as herein described.
10. A roller towel dispenser mechanism comprising a roller as claimed in claim 8 or 9.

Printed in the United Kingdom for

Her Majesty's Stationery Office. Dd 8818935. 1985. 4235.

Published at The Patent Office. 25 Southampton Buildings,

London, WC2A 1AY, from which copies may be obtained.