Abrading – Precision device or process - or with condition responsive... – With indicating
Patent
1994-05-05
1996-01-16
Kisliuk, Bruce M.
Abrading
Precision device or process - or with condition responsive...
With indicating
451 6, 451 56, 451296, 451444, B24B 5310
Patent
active
054843235
DESCRIPTION:
BRIEF SUMMARY
This invention relates to an abrasive belt cleaner, more particularly to the cleaning of the abrasive belt in a wide belt sanding machine.
BACKGROUND OF THE INVENTION
In belt sanders, it is well known that after a period of operation the surface of the abrasive belt becomes loaded or filled with particles of wood and also the resins of the wood, and in fact the belt becomes glazed and virtually ineffective in operation.
One solution to this problem has been to close down the machine, remove he belt and replace the belt with a new belt, the old belt being discarded. Chemical cleaning is also known, but the most common method of cleaning the belt is to apply a block of synthetic or natural rubber, preferably crepe rubber to the surface of the belt with relative motion between the belt and the block of rubber. For small sanders, the block of rubber can be hand held, but in commercial situations and particularly for wide belt sanders it is not practical and can be a dangerous action to hold the block of rubber against the sanding belt.
BRIEF DESCRIPTION OF THE PRIOR ART
One example of the use of a block of rubber is shown in U.S. Pat. No. 4,356,671 in which the rubber block is mounted in a frame which is periodically passed through the sanding machine. Thus, the sanding operation must be interrupted and the block of rubber passed through the machine in place of a piece of wood. However, the tendency with this practice is that the operators tend to permit to pass by the maximum time between cleaning of the belt, and thus the belt can become excessively loaded, and more than one pass of the rubber block may be necessary for effective cleaning. This is loading of the belt can be detrimental to the life of the belt, and also the cleaning is time consuming.
Australian Patent Application No AU-73180/87 shows a belt cleaning device attached exteriorly to a wide belt sander which can automatically contact the cleaning block on the abrasive belt during operation of the belt sander for selected periods of time. The cleaning block is mounted in a holder and there is provided a means for withdrawing the block from the belt, and further means for advancing the block into contact with the belt, the further means thus overcoming the force of the withdrawing means. The movement of the cleaning block can be controlled by a timer, or by a programmable controller, but when the sanding machine is not operative the cleaning block may be in contact with the belt and provision is made to withdraw the cleaning block on starting of the machine.
SUMMARY OF THE INVENTION
It is an object of this invention to provide a sanding belt cleaning unit which overcomes one or more of the disadvantages of the prior art units.
It is a further object of the invention to provide a belt sanding cleaning unit which is attached interiorly of the belt sanding machine.
It is a still further object of the invention to provide a belt cleaning unit in which the cleaning block is not in contact with the sanding belt when the sanding machine is not operative.
It is a further object of the invention to provide a belt sander cleaning unit which while automatic in operation is of simple and economical construction.
There is provided according to the invention a unit for cleaning the abrasive surface of a moving sanding belt, this unit comprising a frame for mounting on the interior of a casing of a belt sanding machine adjacent the moving belt, the frame mounting at least one air operated cylinder, the cylinder actuating a lever to which is attached a holder for the cleaning block, an actuator for the actuation of the cylinder upon the passage of material to be sanded passing through the sanding machine upon that on actuation of the cylinder the cleaning block moves into contact with the surface of the moving abrasive belt.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to more fully describe the invention, reference will now be made to the accompanying drawings in which:
FIG. 1 shows a wide belt sanding machine with the cleaning unit being shown in dotte
REFERENCES:
patent: 3753269 (1973-08-01), Budman
patent: 4356671 (1982-11-01), Gabrielson et al.
patent: 4720939 (1988-01-01), Simpson et al.
WO,a, 81/0080 (Smith) 16 Apr. 1981 entire document.
Kisliuk Bruce M.
Morgan Eileen
LandOfFree
Belt cleaner does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Belt cleaner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Belt cleaner will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-305821