US3613808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article-sorting apparatus with transfer-error-reducing arrangement
Assignee: FMC Corp
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Filing: 1968-12-18
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Granted: 1971-10-19
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Expires: 1988-12-18
Abstract
Abstract An arrangement for reducing weighting inaccuracies in articlesorting apparatus caused by the advancement of continuously moving articles to be weighed onto the weighing platform of a check weighing apparatus. The arrangement employs suitable lockup means, such as a fluid-activated device, that holds or locks the weighing platform in the raised position until the errorproducing activity of the continuously moving article advancing onto the weighing platform has subsided. The lockup means releases the weighing platform during the weighing operation so that the platform is freely deflectable during the weighing operation.
Inventors
- 👤 Philip R Bunnelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:42
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/36; B07C5/363; B07C5/365; B07C5/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
Weighing apparatus comprising a platform; means for advancing articles continuously and in succession onto said platform across which said articles continue to move continuously and in succession; an article-position-sensing mechanism activated in response to an article being advanced from said advancing means onto said platform; yieldable means for supporting said platform including cantilever springs and a preload arm arranged to counterbalance the platform; a stop for limiting the upward movement of said platform, and restraining means responsive to the activation of said article-position-sensing mechanism for restraining said platform against deflection while an article is being advanced from said article-advancing means onto said platform including a fluid-activated device for urging said preload arm in a direction to lock said platform against said stop.
Claim 2
Dependent Claim
122 words
Weighing apparatus comprising a platform; means for advancing articles continuously and in succession onto said platform across which said articles continue to move continuously and in succession; an article-position-sensing mechanism activated in response to an article being advanced from said advancing means onto said platform; yieldable means for supporting said platform including cantilever springs and a preload arm arranged to counterbalance the platform; a stop for limiting the upward movement of said platform, and restraining means responsive to the activation of said article-position-sensing mechanism for restraining said platform against deflection while an article is being advanced from said article-advancing means onto said platform including a fluid-activated device for urging said preload arm in a direction to lock said platform against said stop.
Claim 3
Dependent Claim
17 words
An article-sorting apparatus as claimed in claim 1 wherein said article-position-sensing mechanism includes a fluid control valve.
Claim 4
Dependent Claim
38 words
An article-sorting apparatus as claimed in claim 2 wherein said restraining means for restraining said weighing platform also includes a fluid control circuit operatively controlled by said article-position-sensing mechanism for controlling the operation of said fluid activated device.
References Cited (Backward Citations)
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Cited
US3006469A
Cited
US2889031A
Cited
US3065809A
Cited
US3152655A
Cited
US3095055A
Cited
US3434595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |