Patent US3709355A successfully refreshed from Google Patents.
US3709355A
Expired / Lapsed
US
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Stack height control using cutoff knives
Assignee: Individual
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Filing: 1971-09-13
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Granted: 1973-01-09
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Expires: 1991-09-13
Abstract
Abstract In the usual machine which applies sealing compound to a container closure, a special attachment prevents the feeding of the last few container covers remaining in a feed stack, and permits the feed of closures as soon as the stack of closures to be fed is rebuilt to its proper height. The present machine eliminates this entire mechanism, and supports the few remaining closures in the feed stack on the cutoff knives which themselves become disabled when the closures in the feed stack reach the selected low number. Stack bounce and disarranged closures are eliminated by this device.
Inventors
- 👤 W Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:08
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/44; B21D51/46
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
175 words
A container closure lining machine having a rotating chuck, a hopper member, reciprocating slide feed means including spaced parallel feed bars, means to remove container closures from a feed stack and place closures successively on said rotating chuck, the same machine being characterized by a. one-sided cam tracks formed in each of the said parallel feed bars, b. spring pressed arms pivoted on the said hopper member, c. cam rollers affixed to the arms and bearing against said cam track, d. inwardly facing closure cutoff knives attached adjacent the ends of each arm, e. pins adapted to be projected into the path of each cutoff arm adjacent its remote end, f. a stack height sensor arranged to activate said pins whenever the height of the stack of closures reaches pre-determined low limits, whereby with each reciprocation of the machine a closure is cut off and fed to the chuck until a pre-determined low number of closures remains in the said feed stack, whereupon the remaining closures are supported by the knives which then remain motionless.
Claim 2
Dependent Claim
175 words
A container closure lining machine having a rotating chuck, a hopper member, reciprocating slide feed means including spaced parallel feed bars, means to remove container closures from a feed stack and place closures successively on said rotating chuck, the same machine being characterized by a. one-sided cam tracks formed in each of the said parallel feed bars, b. spring pressed arms pivoted on the said hopper member, c. cam rollers affixed to the arms and bearing against said cam track, d. inwardly facing closure cutoff knives attached adjacent the ends of each arm, e. pins adapted to be projected into the path of each cutoff arm adjacent its remote end, f. a stack height sensor arranged to activate said pins whenever the height of the stack of closures reaches pre-determined low limits, whereby with each reciprocation of the machine a closure is cut off and fed to the chuck until a pre-determined low number of closures remains in the said feed stack, whereupon the remaining closures are supported by the knives which then remain motionless.
Claim 3
Dependent Claim
31 words
A container closure lining machine as claimed in claim 1, wherein the sensor controlling the operation of the said cutoff mechanism has a contact arm bearing on the stack of closures.
Claim 4
Dependent Claim
26 words
A container closure lining machine as claimed in claim 1, wherein the means to project the lockout pins which disable the knife levers is a solenoid.
Claim 5
Dependent Claim
27 words
A container closure lining machine as claimed in claim 1, wherein the means to project the lockout pins which disable the knife levers is an electropneumatic mechanism.
References Cited (Backward Citations)
US2384052A
Cited
US2645366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |