US3584589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thread trimmer
Assignee: Clinton Ind Inc
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Filing: 1970-01-27
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Granted: 1971-06-15
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Expires: 1990-01-27
Abstract
Abstract A sewing machine automatic thread cutter comprises a detachable cutting edge positioned along the top border of the sewing machine foot piece slot, a thread pulling assembly positioned between the sewing machine thread tensioner and sewing needle and including a stationary thread guide flanked by a pair of movable thread guides, and a transversely movable hook for engaging the thread depending from the needle and drawing it across the cutting edge. An actuating rod is reciprocated by a solenoid and in its advance stroke releases the thread tensioner and advances the movable thread guides to draw thread from a source thereof and advances the hook past the thread tail, and in its return stroke returns the guides to relax the thread, reactivates the thread tensioner, and returns the hook which draws the thread across the cutting edge shortly following the tensioning of the thread.
Inventors
- 👤 Anthony Pirrello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:55
CPC Classifications
D; D05; D05B; D05B65/00; D05B65/003
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
193 words
In a sewing machine including a foot member having a recess, a needle, means for holding and for reciprocating said needle along a path between a retracted position and an advanced position through said foot member recess, guide means for leading a thread from a source thereof through said needle to a terminating thread tail extending from said needle, and thread tensioning means engaging said thread between said thread source and said needle, the improvement comprising a thread cutting element positioned on said foot member proximate said recess, first means for drawing said thread tail between said needle in a raised position and said foot member across said cutting element, second means movable between advance and retracted positions for drawing thread between said needle and tensioning means from said source during advance movement of said second means, and third means for actuating said first and second means in a predetermined sequence to advance said second means to draw thread through said tensioning means from said source of thread, and thereafter retract said second means and actuate said first means to draw said thread between said needle and foot member across said cutting element.
Claim 2
Dependent Claim
193 words
In a sewing machine including a foot member having a recess, a needle, means for holding and for reciprocating said needle along a path between a retracted position and an advanced position through said foot member recess, guide means for leading a thread from a source thereof through said needle to a terminating thread tail extending from said needle, and thread tensioning means engaging said thread between said thread source and said needle, the improvement comprising a thread cutting element positioned on said foot member proximate said recess, first means for drawing said thread tail between said needle in a raised position and said foot member across said cutting element, second means movable between advance and retracted positions for drawing thread between said needle and tensioning means from said source during advance movement of said second means, and third means for actuating said first and second means in a predetermined sequence to advance said second means to draw thread through said tensioning means from said source of thread, and thereafter retract said second means and actuate said first means to draw said thread between said needle and foot member across said cutting element.
Claim 3
Dependent Claim
28 words
The sewing machine of claim 1, including means for releasing said thread tensioning means during the drawing of thread through said thread tensioning means by said second means.
Claim 4
Dependent Claim
38 words
The sewing machine of claim 1, including means for releasing said thread tensioning means for an interval between the advance of said second means and the drawing of said thread across said cutting element by said first means.
Claim 5
Dependent Claim
67 words
The sewing machine of claim 1, wherein said thread drawing second means comprises a pair of first and second thread guides engaging said thread along longitudinally spaced points between said tensioning means and said needle and actuatable by said thread between advanced widely transversely spaced thread drawing positions increasing the path of said thread between said tensioning means and said needle and retracted, relatively proximate, transverse positions.
Claim 6
Dependent Claim
32 words
The sewing machine of claim 4, comprising a pair of said first guides engaging said thread on opposite sides of said second guide and synchronously transversely movable relative to said second guide.
Claim 7
Dependent Claim
70 words
The sewing machine of claim 1, wherein said first means comprises a hook member movable along a transverse path between said foot member and said needle in its retracted position, said third means reciprocating said hook along said transverse path with the actuation of said first means in a forward stroke bypassing said thread tail and a return stroke engaging said thread tail and drawing it across said cutting element.
Claim 8
Dependent Claim
41 words
The sewing machine of claim 6, wherein said hook member includes a cam defining outer leg oblique to said transverse path for urging said thread tail sidewise of said hook member on the open side thereof during said forward stroke thereof.
Claim 9
Dependent Claim
29 words
The sewing machine of claim 7, wherein said hook member includes angularly related legs delineating a bight for releasably engaging said thread tail upon retraction of said hook member.
Claim 10
Dependent Claim
43 words
The sewing machine of claim 1, wherein said foot member is bifurcated to form a pair of forwardly directed arms separated by a recess-defining slot, said cutting element being located atop one of said arms and having a cutting edge bordering said slot.
Claim 11
Dependent Claim
45 words
The sewing machine of claim 9, including a support post connected to and projecting upwardly from said foot member, an arm connected to and extenDing upwardly from said cutting element and engaging said post, and means releasably securing said cutting element arm to said post.
Claim 12
Dependent Claim
18 words
The sewing machine of claim 9, comprising means for releasably securing said cutting element to said foot member.
Claim 13
Dependent Claim
133 words
The sewing machine of claim 1, wherein said second means comprises a first stationary guide member and a second transversely movable guide member engaging said thread at points spaced along said thread between said thread tensioning means and said needle, said first means comprises a hook member movable along a transverse path between said foot member and said needle in its retracted position, and said third means comprises a transversely reciprocable rod, a bracket arm secured to and depending from said rod and supporting said second guide member, a rocker arm mounted for rocking about a forwardly rearwardly extending axis, said hook member being mounted on said rocker arm proximate an end thereof, and means coupling said rocker arm to said bracket arm for oscillating said arm with the reciprocation of said rod.
Claim 14
Dependent Claim
22 words
The sewing machine of claim 12, including means for transversely adjusting the position of said second guide member on said bracket arm.
Claim 15
Dependent Claim
20 words
The sewing machine of claim 12, including means for adjusting the position of said hook member on said rocker arm.
Claim 16
Dependent Claim
34 words
The sewing machine of claim 12, wherein said bracket arm has a vertically extending slot formed therein and said coupling means comprises a follower mounted on said rocker arm and slideably engaging said slot.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |