US Patent: 2,064,476
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| Abrading machine
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Patentee:
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| Gustave T. Johnson (exact or similar names) - Sheboygan Falls, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 25, 1931 |
| Granted: |
Dec. 15, 1936 |
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Jeff Joslin
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Description: |
| "Roll (drum) sanders have proven objectionable in several respects, but the principal objection to this type of sanding machine is the necessity for a comparatively slow rate of work feed. The reason for this slow feed is that the abrading cylinders or rolls have little more than a line contact with the work passing therebeneath. Theoretically this contact is but a very narrow line extending across the work at the point of tangency of the abrading cylinder with the work, but by reason of the inherent resiliency of the felt or other material with which the roll is covered beneath the abrading material, the area of contact between the abrading cylinder and the work is increased to a string approximately one-half inch wide. However, even this degree of contact between the abrasive element and the work is small and therefore to obtain satisfactory results it is necessary to maintain the feed at less then twenty feet per minute... In this respect it is desired to point out that the machine of this invention enable the rate of work feed to be increased from approximately twenty feet per minute to between sixty and one hundred feet per minute." |
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