US3841028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for handling workpieces to be polished
Assignee: Crane Packing Co
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Filing: 1972-08-24
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Granted: 1974-10-15
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Expires: 1992-08-24
Abstract
Abstract Disclosed is an apparatus for handling workpieces to be polished on a rotatable disc type of polishing machine and comprising a workholder mounted on an arm oscillatable in a vertical plane through substantially 180* so that in one position the workholder is inverted to facilitate loading and unloading thereof, and in another position the workholder supports the workpieces by differential pressure thereon over the polishing disc. The movement of the arm may be arrested as the workpieces touch the polishing disc, and an air cylinder on the arm moves the workholder against the disc and presses the workholder against the disc with a higher pressure than is permissible with waxadhered workpieces. At the termination of the polishing operation the workholder is raised from the polishing disc and the arm is rotated to invert the workholder, after which a cleaning spray is automatically applied to the workpieces.
Inventors
- 👤 E Katzke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:13
CPC Classifications
B; B24; B24B; B24B37/00; B24B37/34; B24B37/345; B24B41/00; B24B41/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
Apparatus for applying workpieces to and removing them from a substantially horizontally operating abrading tool, said apparatus comprising a platen, means for mounting the workpieces on said platen for a movement therewith, an arm having a horizontally disposed pivot located to one side of the tool, means for oscillating said arm about its pivot through substantially 180*, means for mounting the platen on the arm to cause said platen at one extreme position of the arm to assume an inverted position to permit loading of the workpieces thereon and at the other extreme position to be located over said abrading tool with the workpieces adjacent said tool, said platen mounting means comprising means for advancing said platen toward said tool independently of said arm oscillating means and independently of said workpiece mounting means, and fluid pressure means for holding said workpieces against said tool with a predetermined pressure while said tool is abrading said workpieces.
Claim 2
Dependent Claim
155 words
Apparatus for applying workpieces to and removing them from a substantially horizontally operating abrading tool, said apparatus comprising a platen, means for mounting the workpieces on said platen for a movement therewith, an arm having a horizontally disposed pivot located to one side of the tool, means for oscillating said arm about its pivot through substantially 180*, means for mounting the platen on the arm to cause said platen at one extreme position of the arm to assume an inverted position to permit loading of the workpieces thereon and at the other extreme position to be located over said abrading tool with the workpieces adjacent said tool, said platen mounting means comprising means for advancing said platen toward said tool independently of said arm oscillating means and independently of said workpiece mounting means, and fluid pressure means for holding said workpieces against said tool with a predetermined pressure while said tool is abrading said workpieces.
Claim 3
Dependent Claim
30 words
Apparatus as defined in claim 1, and means, automatically operable upon said arm reaching its extreme position opposite said first-mentioned extreme position, for spraying said articles with a cleaning fluid.
Claim 4
Dependent Claim
69 words
Apparatus as defined in claim 2, said means for supporting said workpieces comprising a platen having a plurality of stations thereon one for each workpiece, means at each station for applying sub-atmospheric pressure to the workpiece to hold said workpiece on the platen, manually operable means for controlling the application of subatmospheric pressure and means controlled by movement of the platen for controlling the application of the cleaning liquid.
Claim 5
Dependent Claim
41 words
Apparatus as defined in claim 1, and comprising further means operated in timed relation to the position of the portion of said arm over the tool for initiating the operation of the means for advancing said workpiece-supporting means toward said tool.
Claim 6
Dependent Claim
69 words
Apparatus as defined in claim 2, said means automatically operable upon said arm reaching its extreme position opposite said first-mentioned extreme position for spraying said articles with a cleaning fluid comprising an air-operated valve, a source of air under pressure, a solenoid-operated valve for controlling application of air under pressure from said source to said air-operated valve, and a switch operated by said platen for energizing said solenoid-operated valve.
Claim 7
Dependent Claim
114 words
Apparatus as described in claim 1, said tool comprising a polishing disc, and means for driving said disc about a vertical axis, said workpieces comprising discs of a thickness varying from 0.005 inch to 0.015 inch, and pressure-differential operated means on said workpiece supporting means and comprisinG the sole means for holding said workpieces on the workpiece supporting means, said workpieces being of a material characterized by increased abrading action by the tool as the temperature of the material increases, and said predetermined pressure increasing the friction between the workpiece and tool thereby increasing the temperature of the workpieces above the melting point of wax to increase the abrading action of the tool thereon.
References Cited (Backward Citations)
US765105A
Cited
US1275447A
Cited
US2963830A
Cited
US3128580A
Cited
US3437543A
Cited
US3579916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |