US3744093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for regularizing the output of drawing frames of the kind used in textile spinning
Assignee: Zellweger Uster AG
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Filing: 1970-11-09
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Granted: 1973-07-10
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Expires: 1990-11-09
Abstract
Abstract Method and apparatus for regularizing the output of drawing frames of the type used in the textile spinning industry. At least one of the slivers delivered to the drawing frame is passed through a pair of cylinders having a rotational speed controlled by a measuring signal generated by a measuring element corresponding to the overall cross section of the output of the drawing frame.
Inventors
- 👤 E Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:42
CPC Classifications
D; D01; D01H; D01H5/00; D01H5/18; D01H5/32; D01H5/38; D01H5/42
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
An apparatus for regularizing the output of a textile drawing frame, comprising means for drawing and drafting a plurality of individual slivers including at least one pair of main cylinders driven at a substantially constant speed, at least one pair of auxiliary cylinders having drive means connected thereto for controllably rotating said auxiliary cylinders, and a measuring element responding to the output of the drawing and drafting means for controlling said drive means, the pair of auxiliary cylinders being arranged to subject at least one sliver, but not all slivers, to a variable draft with respect to the crosssection thereof.
Claim 2
Independent Claim
100 words
An apparatus for regularizing the output of a textile drawing frame, comprising means for drawing and drafting a plurality of individual slivers including at least one pair of main cylinders driven at a substantially constant speed, at least one pair of auxiliary cylinders having drive means connected thereto for controllably rotating said auxiliary cylinders, and a measuring element responding to the output of the drawing and drafting means for controlling said drive means, the pair of auxiliary cylinders being arranged to subject at least one sliver, but not all slivers, to a variable draft with respect to the crosssection thereof.
Claim 3
Dependent Claim
48 words
An apparatus according to claim 1, wherein the pair of auxillary cylinders is arranged in the middle of the drawing frame so as to act on at least a centrally arranged sliver of said plurality of individual slivers adjacent to one another for delivery to the drawing frame.
Claim 4
Dependent Claim
46 words
An apparatus according to claim 1, wherein said drive means includes means for continuously varying the rotational speed of the pair of auxiliary cylinders in dependence upon a measuring signal generated by the measuring element in response to the output of the drawing and drafting means.
Claim 5
Dependent Claim
48 words
An apparatus according to claim 3, wherein the pair of auxillary cylinders is arranged in the middle of the drawing frame so as to act on at least a centrally arranged sliver of a group of individual slivers adjacent to one another for delivery to the drawing frame.
Claim 6
Dependent Claim
135 words
An apparatus according to claim 1, wherein two pairs of auxiliary cylinders are provided, each of which is arranged to receive a particular sliver, and said drive means includes means for controlling the rotational speed of the cylinders in such manner that, on the occurrence of a measuring signal corresponding to a total quantity of fibers within a predetermined tolerance range, only one of the pairs of auxiliary cylinders is driven at a predetermined rotational speed and the other pair of stopped, while both pairs of auxiliary cylinders are driven at a predetermined rotational speed when the measuring signal corresponds to a total quantity of fibers below the predetermined tolerance range, and both pairs of auxiliary cylinders are stopped when the measuring signal corresponds to a total quantity of fibers above the predetermined tolerance range.
Claim 7
Independent Claim
113 words
A method of regularizing the output of a drawing frame including at least one pair of main drawing cylinders operating at a substantially constant speed for use in the spinning industry, comprising: delivering a plurality of slivers to said pair of main drawing cylinders of the drawing frame; drafting said plurality of slivers at a substantially constant speed; condensing said plurality of drafted slivers; detecting the density variation of the cross-sectional output of the condensed sliver; and changing the rate of feed of at least one, but not all, of the slivers delivered to said main drawing cylinders in response to the detected density variations of the cross-sectional output of the condensed sliver.
Claim 8
Independent Claim
113 words
A method of regularizing the output of a drawing frame including at least one pair of main drawing cylinders operating at a substantially constant speed for use in the spinning industry, comprising: delivering a plurality of slivers to said pair of main drawing cylinders of the drawing frame; drafting said plurality of slivers at a substantially constant speed; condensing said plurality of drafted slivers; detecting the density variation of the cross-sectional output of the condensed sliver; and changing the rate of feed of at least one, but not all, of the slivers delivered to said main drawing cylinders in response to the detected density variations of the cross-sectional output of the condensed sliver.
Claim 9
Dependent Claim
65 words
A method according to claim 6, wherein the step of changing the rate of feed of at least one, but not all, of the slivers includes selectively stopping at least two slivers, one sliver or none of the slivers in dependence upon whether the value of said density variation of the condensed sliver exceeds, is within or is less than a predetermined tolerance range, respectively.
Claim 10
Dependent Claim
40 words
A method according to claim 5, wherein the one sliver delivered at a changing rate has a fiber content per sliver of between about 1 percent and 5 percent of the total quantity of fibers delivered to the drawing frame.
Claim 11
Dependent Claim
57 words
A method according to claim 8, wherein said step of controlling the rotational speed includes regulating the speed within a predetermined tolerance range corresponding to the quantity of condensed fibers so as to regulate the speed in stages, whereby a constant quantity of fibers is added or retained when the density variation deviates from the tolerance range.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |