US3747827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronically controlled stitching machine
Assignee: Molins Machine Co Inc
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Filing: 1972-02-02
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Granted: 1973-07-24
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Expires: 1992-02-02
Abstract
Abstract Stitching machines are disclosed which include first means in the form of a stitching head for applying stitches to a work piece passing thereby; second means preferably in the form of cooperating pull rollers for conveying the work piece past the stitching head; a motor selectively connectable to the pull rollers for the operation thereof; interconnection means in the form of a clutch-brake combination responsive to preselected operating signals for selectively connecting and disconnecting the motor to the pull rollers to thereby effectuate incremental indexing of the work piece past the stitching head; and electronic control means for generating the preselected operating signals necessary to effectuate the incremental advance of the work piece through the machine. Three embodiments are shown in which the operation of the stitching head is coordinated with the operation of the clutch-brake combination in different ways.
Inventors
- 👤 W Verwey
- 👤 S Stanton
- 👤 E Varholy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:02
CPC Classifications
B; B31; B31B; B31B50/00; B31B50/60; B31B50/68; B31B50/684
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
79 words
A stitching machine comprising: first means for applying fastening means to a work piece passing thereby; second means for conveying said work piece past said first Means; motive means selectively connectable to said second means for the operation thereof; interconnection means responsive to preselected operating signals for selectively connecting and disconnecting said motive means and said second means; and control means for generating said preselected operating signals to operate said interconnection means in coordinated relationship with said first means.
Claim 2
Dependent Claim
79 words
A stitching machine comprising: first means for applying fastening means to a work piece passing thereby; second means for conveying said work piece past said first Means; motive means selectively connectable to said second means for the operation thereof; interconnection means responsive to preselected operating signals for selectively connecting and disconnecting said motive means and said second means; and control means for generating said preselected operating signals to operate said interconnection means in coordinated relationship with said first means.
Claim 3
Dependent Claim
46 words
The stitching machine of claim 1 wherein said interconnection means includes clutch means for connecting said motive means and said second means; and said control means includes clutch-on circuit means for applying an operating signal to said clutch means for a first preselected period of time.
Claim 4
Dependent Claim
53 words
The stitching machine of claim 2 and further including control signal generating means responsive to operation of said first means for generating a first control signal for said first preselected period of time; and said control means includes enabling circuit means responsive to said first control signal for enabling said clutch-on circuit means.
Claim 5
Dependent Claim
57 words
The stitching machine of claim 2 wherein said interconnecting means further includes braking means for positively halting the motion of said second means, and wherein said control means includes brake-on circuit means for applying an operating signal to said braking means for a second preselected period of time which occurs after said first preselected period of time.
Claim 6
Dependent Claim
82 words
The stitching machine of claim 4 and further including control signal generating means responsive to operation of said first means for generating a first control signal for said first preselected period of time and a second control signal for said second preselected period of time after the occurrence of said first preselected period of time; and said control means includes first enabling-disabling circuit means responsive to said, first control signal for enabling said clutch-on circuit means and disabling said brake-on circuit means.
Claim 7
Dependent Claim
34 words
The stitching machine of claim 5 wherein said control means further includes second enabling-disabling circuit means responsive to said second control signal for enabling said brake-on circuit means and disabling said clutch-on circuit means.
Claim 8
Dependent Claim
75 words
The stitching machine of claim 2 wherein said clutch-on circuit means includes first circuit means for applying an operating signal of a first predetermined magnitude to said clutch means for an initial portion of said first preselected period of time and second circuit means for applying an operating signal of a second predetermined magnitude less than said first preselected magnitude to said clutch means for the remaining portion of said first preselected period of time.
Claim 9
Dependent Claim
127 words
The stitching machine of claim 7 wherein said interconnecting means further includes braking means for positively halting the motion of said second means, and wherein said control means includes brake-on circuit means for applying an operating signal to said braking means for a second preselected period of time which occurs after said first preselected period of time; and wherein said brake-on circuit means includes third circuit means for applying an operating signal of a third predetermined magnitude to said braking means for an initial portion of said second preselected period of time and fourth circuit means for applying an operating signal of a fourth predetermined magnitude less than said third predetermined magnitude to said braking means for the remaining portion of said second preselected period of time.
Claim 10
Dependent Claim
24 words
The stitching machine of claim 8 wherein said first and third predetermined magnitudes are equal, and said second and fourth predetermined magnitudes are equal.
Claim 11
Dependent Claim
110 words
The stitching machine of claim 8 and further including control signal generating means responsive to operation of said first means for generating a first control signal for said first preselected period of time and a second control signal for said second preselected period of time after the occurrence of said firSt preselected period of time; said control means includes first enabling-disabling circuit means responsive to said first control signal for enabling said clutch-on circuit means and disabling said brake-on circuit means; and wherein said control means further includes second enabling-disabling circuit means responsive to said second control signal for enabling said brake-on circuit means and disabling said clutch-on circuit means.
Claim 12
Dependent Claim
125 words
The stitching machine of claim 5 wherein said first means is a stitching head having stitch driving means for driving a stitch into said work piece during a portion of a stitching cycle; said stitching head having operating means for causing said control signal generating means to generate said second control signal when said stitch is being driven into said work piece and for causing said control signal generating means to generate said first control signal at all other times during said stitching cycle; whereby said clutch means will be engaged to advance said work piece whenever said stitching head is not driving a stitch, and said brake means will be engaged to halt said work piece whenever said stitching head is driving a stitch.
Claim 13
Dependent Claim
89 words
The stitching machine of claim 11 wherein said control signal generating means includes a voltage source, a turn-on clutch line, an inverting turn-on brake line in parallel with said turn on clutch line and normally open contact means in series with the parallel network of said turn-on clutch line and said inverting turn-on brake line for generating said first control signal on said turn-on clutch line when said contacts are closed and for generating said second control signal on said inverting turn-on brake line when said contacts are open.
Claim 14
Dependent Claim
38 words
The stitching machine of claim 12 wherein operating means of said stitching head maintains said contact means open when said stitch is being driven into said work piece and closed at all other times in said stitching cycle.
Claim 15
Dependent Claim
103 words
The stitching machine of claim 13 wherein said stitching head includes a shaft rotating in synchronism with the operation of said stitch driving means, said shaft having a flat position thereon of predetermined size relative to the remaining circumference of said shaft to correspond to the portion of said stitching cycle when said stitch is being driven in said work piece; said normally open contact means being in preselected location with respect to said shaft to be closed by said remaining portion of said circumference thereof and allowed to revert to its normally open condition by virtue of said flat confronting contact means.
Claim 16
Dependent Claim
37 words
The stitching machine of claim 11 wherein said stitching head includes motor means, clutching means selectively operable to interconnect said motor means and said stitch driving means, and stitcher head starting means for energized said clutching means.
Claim 17
Dependent Claim
45 words
The stitching machine of claim 15 and further including counter means responsive to operation of said stitching head for accumulating a preselected number of stitches; and stitcher head stopping means responsive to said counter accumulating said preselected number of stitches for de-energizing said clutching means.
Claim 18
Dependent Claim
56 words
The stitching machine of claim 16 wherein said control means further includes start-up means for initially enabling said first enabling-disabling circuit means; whereby when said start up means is operated, said clutch means will be energized; said brake means will be de-energized; and said second means will continueously convey said work piece toward said stitching head.
Claim 19
Dependent Claim
81 words
The stitching machine of claim 17 wherein said stitcher head starting means includes work piece sensing means responsive to said work piece reaching a predetermined position with respect to said stitching head for generating a start-timer control signal; timing means responsive to said start-timer control signal for generating a braking means enabling signal at a preselected time after reception of said start-time control signal; and braking means enabling circuitry responsive to said braking means enabling signal for energizing said braking means.
Claim 20
Dependent Claim
37 words
The stitching machine as defined in claim 1 in which said first means is rendered effective by a first control signal and said control means generates said first control signal as well as said preselected operating signal.
Claim 21
Dependent Claim
17 words
The stitching machine as defined in claim 19 in which said control means includes a program timer.
Claim 22
Dependent Claim
25 words
The stitching machine as defined in claim 20 in which said program timer includes means for providing signals in response to patterns prerecorded on tape.
Claim 23
Dependent Claim
18 words
The stitching machine as defined in claim 20 also including a flip-flop for providing said first control signal.
Claim 24
Dependent Claim
25 words
The stitching machine as defined in claim 22 in which said program timer includes means for providing signals in response to patterns prerecorded on tape.
Claim 25
Dependent Claim
34 words
The stitching machine as defined in claim 23 in which said control means also drives a break coil to a clutch coil for selectively connecting and disconnecting said motive means and said second means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |