US3785138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning unit for open end spinning machine
Assignee: Elitex Zavody Textilniho
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Filing: 1972-03-09
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Granted: 1974-01-15
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Expires: 1992-03-09
Abstract
Abstract A spinning unit for use in textile machines, particularly open end spinning machines, comprises a carding roller and a spinning chamber. A supply channel is provided for fibers travelling from the carding roller to the spinning chamber. A yarn withdrawal channel is provided through which yarn is withdrawn from the spinning chamber. At least one detachably mounted expandable wear portion is provided, defining at least part of one of the channels.
Inventors
- 👤 J Rajnoha
- 👤 L Bures
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:38
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/40; D01H4/04; D01H4/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
104 words
A spinning unit for use in textile machines, particularly open end spinning machines comprising carding means for separating fibrous material; spinning chamber means for converting separated fibrous material into yarn; and channel defining means communicating with said carding means and spinning chamber means and defining a fiber supply channel through which fibers travel from said carding means to said spinning chamber means, and further defining a yarn withdrawal channel through which yarn is withdrawn from said spinning chamber means, said channel defining means including at least one discrete detachably mounted expendable wear portion defining at least part of at least one of said channels.
Claim 2
Dependent Claim
104 words
A spinning unit for use in textile machines, particularly open end spinning machines comprising carding means for separating fibrous material; spinning chamber means for converting separated fibrous material into yarn; and channel defining means communicating with said carding means and spinning chamber means and defining a fiber supply channel through which fibers travel from said carding means to said spinning chamber means, and further defining a yarn withdrawal channel through which yarn is withdrawn from said spinning chamber means, said channel defining means including at least one discrete detachably mounted expendable wear portion defining at least part of at least one of said channels.
Claim 3
Dependent Claim
76 words
A spinning unit as defined in claim 1, said carding means including a carding chamber, a carding roller mounted for rotation in said chamber, and a feed passage in part defined by the periphery of said carding roller and extending along a given direction, and wherein said supply channel extends along said given direction and forms a continuation of said feed passage, said detachably mounted expendable wear portion defining at least part of said supply channel.
Claim 4
Dependent Claim
74 words
A spinning unit as defined in claim 1, said carding means including a carding chamber and a carding roller mounted for rotation in said carding chamber, said supply channel having a mouth opening towards said carding roller, and wherein said expendable wear portion defines at least part of said supply channel and includes an edge portion defining said mouth of said supply channel, at least part of said edge portion constituting a fiber-separating edge.
Claim 5
Dependent Claim
31 words
A spinning unit as defined in claim 1, said expendable wear portion defining at least part of said supply channel, said supply channel having a transverse cross-section of substantially slot-shaped configuration.
Claim 6
Dependent Claim
21 words
A spinning unit as defined in claim 4, said transverse cross-section being substantially constant along the length of said supply channel.
Claim 7
Dependent Claim
23 words
A spinning unit as defined in claim 4, said transverse cross-section decreasing in direction from said carding means to said spinning chamber means.
Claim 8
Dependent Claim
23 words
A spinning unit as defined in claim 4, said transverse cross-section diverging in direction from said carding means to said spinning chamber means.
Claim 9
Dependent Claim
31 words
A spinning unit as defined in claIm 7, at least one of said carding chamber housing and guide means being provided with recessed portions receiving and retaining said expandable wear portion.
Claim 10
Dependent Claim
72 words
A spinning unit as defined in claim 1, said expendable wear portion defining at least part of said supply channel; said carding means comprising a housing defining a carding chamber; and further comprising dismountable guide means detachably mounted on said carding chamber housing and at least in part defining a guide passage extending in direction from said carding means towards said spinning chamber means and constituting an extension of said supply channel.
Claim 11
Dependent Claim
33 words
A spinning unit as defined in claim 1, said expendable wear portion defining at least part of said yarn withdrawal channel, and said yarn withdrawal channel having an at least substantially circular cross-section.
Claim 12
Dependent Claim
36 words
A spinning unit as defined in claim 1, said supply channel extending substantially in a first direction and said yarn withdrawal channel extending substantially in a second direction defining with said first direction an acute angle.
Claim 13
Dependent Claim
89 words
A spinning unit as defined in claim 1, said expendable wear portion defining at least part of said supply channel; said carding means comprising a housing defining a carding chamber, said housing being provided with at least one recessed portion defined at least in part by a wall portion having a general plane, said expendable wear portion being at least in part received in said recessed portion, and said supply channel having an outlet and an edge portion defining said outlet, said edge portion lying in said general plane.
References Cited (Backward Citations)
US3481128A
Cited
US3624995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |