Patent US3763804A successfully refreshed from Google Patents.
US3763804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for threading yarn ends into the working needles of embroidery stitching and sewing machines
Assignee: Individual
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Filing: 1972-04-14
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Granted: 1973-10-09
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Expires: 1992-04-14
Abstract
Abstract The invention concerns a method and an apparatus for threading of yarn ends into the working needles of embroidery, stitching and sewing machines. This is achieved by clamping the end of the yarn which is to be inserted, to the open end of a compressed air channel; the end of this channel is connected to a hollow needle bar, and, after its release, the yarn is guided by compressed air through the hollow needle bar to a threading loop which can move through the eye of the needle.
Inventors
- 👤 R Reich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:43
CPC Classifications
D; D05; D05B; D05B87/00; D05B87/02; D05D; D05D2207/00; D05D2207/02; D05D2207/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A method of inserting a thread or yarn into the eye of a working needle of a machine, such as embroidery, stitching and sewing machines, comprising the steps of: maintaining the thread in a gas channel which communicates at one end with a threading loop adapted to be pushed through the eye of the needle, supplying compressed gas into the channel to propel the thread into the threading loop, pushing the threading loop through the eye of the needle, and retracting the threading loop from the eye of the needle to complete the threading operation.
Claim 2
Independent Claim
95 words
A method of inserting a thread or yarn into the eye of a working needle of a machine, such as embroidery, stitching and sewing machines, comprising the steps of: maintaining the thread in a gas channel which communicates at one end with a threading loop adapted to be pushed through the eye of the needle, supplying compressed gas into the channel to propel the thread into the threading loop, pushing the threading loop through the eye of the needle, and retracting the threading loop from the eye of the needle to complete the threading operation.
Claim 3
Independent Claim
143 words
An apparatus for inserting a thread or yarn into the eye of a working needle of a machine comprising: a working head, a hollow needle bar slidable within said head, a needle support in one end of said needle bar for supporting a needle therein, said support defining a thread channel, a threading loop in alignment with said thread channel, said loop being adapted to be pushed through the eye of the needle, a threading device adapted to be coupled to said needle bar, said threading device defining a gas channel for receiving one end of the thread, said gas channel being adapted to be coupled to a source of compressed gas for propelling the thread end into the thread channel and into the loop, and means for controllably pushing the threading loop through the eye of the needle for threading the needle.
Claim 4
Independent Claim
143 words
An apparatus for inserting a thread or yarn into the eye of a working needle of a machine comprising: a working head, a hollow needle bar slidable within said head, a needle support in one end of said needle bar for supporting a needle therein, said support defining a thread channel, a threading loop in alignment with said thread channel, said loop being adapted to be pushed through the eye of the needle, a threading device adapted to be coupled to said needle bar, said threading device defining a gas channel for receiving one end of the thread, said gas channel being adapted to be coupled to a source of compressed gas for propelling the thread end into the thread channel and into the loop, and means for controllably pushing the threading loop through the eye of the needle for threading the needle.
Claim 5
Dependent Claim
38 words
The apparatus according to claim 2, and a needle bar nipper defining said gas channel for coupling the needle bar to the threading device, and a compressed gas line including a nozzle for controllably pressurizing said gas channel.
Claim 6
Dependent Claim
25 words
The apparatus according to claim 3 and, an actuating pawl holding said needle bar, and a sliding push rod actuator for releasably actuating said pawl.
Claim 7
Dependent Claim
23 words
The apparatus according to claim 4 wherein, said push rod actuator comprises a cone, and a spring loaded pin coacting with said cone.
Claim 8
Dependent Claim
41 words
The apparatus according to claim 5 and, a housing for said threading device, said needle bar nipper being slidably mounted within said housing, an actuating bar attached to said needle bar nipper, and an actuating lever for actuating said actuating bar.
Claim 9
Dependent Claim
30 words
The apparatus of claim 6 wherein, said actuating lever comprises an actuating trigger rotably mounted on an actuating nipper, and an actuating pawl connecting said nipper to said actuating lever.
Claim 10
Dependent Claim
46 words
The apparatus according to claim 7, and a needle bar head which fills said hollow needle bar at its needle end and which carries the working needle, and said needle bar head defining said thread channel which communicates with the hollow chamber of the needle bar.
Claim 11
Dependent Claim
36 words
The apparatus according to claim 8, and a compressed air valve in the path of the actuating lever, said valve being actuated by said actuating lever for controlling the flow of gas in the gas line.
Claim 12
Dependent Claim
29 words
The apparatus according to claim 9, and a takeup foot operatively associated with said working head, and a takeup shoe for fitting the threading device onto said working hEad.
Claim 13
Dependent Claim
30 words
The apparatus according to claim 10, and a needle head for holding said needle and defining said thread channel, and said needle head being detachably secured to a needle shank.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |