US3673418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic registering apparatus
Assignee: FJ Littell Machine Co
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Filing: 1970-09-14
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Granted: 1972-06-27
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Expires: 1990-09-14
Abstract
Abstract The strip material which is fed intermittently in desired feed lengths is provided with register marks at feed length intervals and photoelectric means continuously scan the strip to detect the marks and effect adjustment of the feed rolls either forwardly or rearwardly through the brake mechanism so as obtain the desired accurate registration of the marks. The photoelectric means produce electric signals as the marks are scanned and said electric signals are passed by shutter means only in the event the mark is detected in either the lead or in the lag zones. The electric signals thus passed are caused to produce electric pulses which are delivered to an electric motor having driving relation with the brake mechanism.
Inventors
- 👤 Chester M Wiig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:58
CPC Classifications
B; B26; B26D; B26D5/00; B26D5/20; B26D5/30; B26D5/34; B21; B21D; B21D43/00; B21D43/02; B21D43/04; B21D43/08; B21D43/09
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
194 words
In mechanism for detecting and maintaining accurate register of strip material having a registering mark thereon with lead and lag zones on resPective sides of the mark and wherein said strip is fed intermittently in predetermined feed lengths, in combination, a pair of intermittently rotating feed rolls, brake mechanism in operative association with said feed rolls for frictionally braking the rolls during their rotation and for frictionally holding the rolls stationary between feeding cycles, electronic means for continuously scanning the strip material whereby said means produces electric signals as the surface of the strip and the register mark are alternately scanned, additional electric means for receiving said electric signals, shutter means in associated relation with said additional electric means and having rotation in synchronism with the feeding operations, whereby electric pulses are produced in the event the mark is detected in either the lag or the lead zones on respective sides of the mark, an electric motor in operative drive relation with the brake mechanism, and means delivering said electric pulses to the motor to activate the same for effecting a correction by effecting a micro-movement of the feed rolls through the brake mechanism.
Claim 2
Dependent Claim
194 words
In mechanism for detecting and maintaining accurate register of strip material having a registering mark thereon with lead and lag zones on resPective sides of the mark and wherein said strip is fed intermittently in predetermined feed lengths, in combination, a pair of intermittently rotating feed rolls, brake mechanism in operative association with said feed rolls for frictionally braking the rolls during their rotation and for frictionally holding the rolls stationary between feeding cycles, electronic means for continuously scanning the strip material whereby said means produces electric signals as the surface of the strip and the register mark are alternately scanned, additional electric means for receiving said electric signals, shutter means in associated relation with said additional electric means and having rotation in synchronism with the feeding operations, whereby electric pulses are produced in the event the mark is detected in either the lag or the lead zones on respective sides of the mark, an electric motor in operative drive relation with the brake mechanism, and means delivering said electric pulses to the motor to activate the same for effecting a correction by effecting a micro-movement of the feed rolls through the brake mechanism.
Claim 3
Dependent Claim
44 words
In mechanism for detecting and maintaining accurate register of strip material as defined by claim 1, wherein electronic means and the additional electric means each include a source of light and a receiver comprising a photoelectric cell for receiving reflected light from said source.
Claim 4
Dependent Claim
71 words
In mechanism for detecting and maintaining accurate register of strip material as defined by claim 1, wherein the electronic means includes a source of light and a receiver in the form of a photoelectric cell, wherein the electric means includes a pair of light sources and a photoelectric cell receiver for each, and the receiver of said electronic means being electrically connected to the light sources of said additional electric means.
Claim 5
Dependent Claim
39 words
In mechanism for detecting and maintaining accurate register of strip material as defined by claim 3, wherein the shutter means is located between the light sources of the said additional electric means and the receiver for said sources respectively.
Claim 6
Dependent Claim
211 words
In mechanism for detecting and maintaining accurate register of strip material having a registering mark thereon with lead and lag zones on respective sides of the mark and wherein said strip is fed intermittently in predetermined feed lengths, in combination, a pair of intermittently rotating feed rolls, brake mechanism having friction discs in operative association with said feed rolls for frictionally braking the rolls during their rotation and for frictionally holding the rolls stationary between feeding cycles, electronic means for continuously scanning the strip material whereby said means produces electric signals as the surface of the strip and the register mark are alternately scanned, additional electric means for receiving said electric signals, shutter means in associated relation with said additional electric means and having rotation in synchronism with the feeding operations, whereby electric pulses are produced in the event the mark is detected in either the lag or the lead zones on respective sides of the mark, an electric motor in operative drive relation with the friction discs of the brake mechanism, and means delivering said electric pulses to the motor to activate the same immediately following a feeding operation for effecting a correction by effecting a micro-movement of the friction discs and thus a similar micro-movement of the feed rolls.
Claim 7
Dependent Claim
211 words
In mechanism for detecting and maintaining accurate register of strip material having a registering mark thereon with lead and lag zones on respective sides of the mark and wherein said strip is fed intermittently in predetermined feed lengths, in combination, a pair of intermittently rotating feed rolls, brake mechanism having friction discs in operative association with said feed rolls for frictionally braking the rolls during their rotation and for frictionally holding the rolls stationary between feeding cycles, electronic means for continuously scanning the strip material whereby said means produces electric signals as the surface of the strip and the register mark are alternately scanned, additional electric means for receiving said electric signals, shutter means in associated relation with said additional electric means and having rotation in synchronism with the feeding operations, whereby electric pulses are produced in the event the mark is detected in either the lag or the lead zones on respective sides of the mark, an electric motor in operative drive relation with the friction discs of the brake mechanism, and means delivering said electric pulses to the motor to activate the same immediately following a feeding operation for effecting a correction by effecting a micro-movement of the friction discs and thus a similar micro-movement of the feed rolls.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |