US3703023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for rendering textile slivers uniform
Assignee: Oerlikon Textile GmbH and Co KG
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Filing: 1970-09-30
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Granted: 1972-11-21
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Expires: 1990-09-30
Abstract
Abstract Textile apparatus for reducing the unevenness in textile slivers. A card feeds sliver to a sensing device which detects any thickness variations and, through a draft control device, controls a variable speed motor which drives one of two pairs of drafting rollers, the other pair of which is driven at a substantially constant rate, the difference in speed between the pairs serving to draft the silver and also reduce the unevenness. An intermediate sliver storage device is located either (1) between the drafting rolls and the sliver coiler means which feeds the sliver into a can, or (2) between the card and the sliver sensing device. Photoelectric detecting means monitors the level of the sliver in the storage device and controls a second variable speed motor which, in the first modification drives the sliver coiler means, and in the second modification drives the card to maintain substantially constant the sliver level in the storage device. Either pair of drafting rolls may be variably driven, and each pair is provided with a tacho-generator to monitor its speed, the two tacho-generators operating in the event of any variation in the speed of the normally constant speed rolls to further vary, through the draft control device, the speed of the variable speed rolls to compensate for any erratic variation in the constant speed rolls. The second variable speed motor is controlled by varying the field current which effects a more gradual speed change and is advisable because of the high inertia of the card and the sliver coiler means.
Inventors
- 👤 Paul Krauss
- 👤 Wolfgang Igel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:33
CPC Classifications
D; D01; D01G; D01G21/00; D01G23/00; D01G23/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
238 words
Apparatus for producing uniform textile slivers comprising: a sliver feeding device (1); a sliver receiving device (49); separate electric motors (10 and 51'' or 10'' and 51) for driving said feeding and said receiving devices, one motor being of constant speed and the other of variable speed; a sliver sensing device (12, 13) intermediate said feeding and receiving devices; a draft control device (19) controlled by said sensing device, an intermediate sliver storage device (40) intermediate said feeding and receiving devices, and means (41, 42) for detecting the level of sliver therein, said detecting means being operatively connected to a charging level control device (44) for controlling said variable speed motor whereby to maintain a substantially constant level of sliver in said storage device; a drafting device intermediate said feeding and receiving devices comprising a pair of driven feed rolls (27) and a pair of driven output rolls (29), one of said pairs of rolls being driven at a substantially constant speed; a second variable speed motor (31) for driving the other of said pairs of rolls and controlled by said draft control device to eliminate sliver unevenness detected by said sensing device; and said draft control device being operatively connected to both variable speed motors whereby their speeds are concurrently controlled by the sliver sensing device and the speed of said first variable speed motor may be varied independently of said sliver level detecting means (41, 42).
Claim 2
Dependent Claim
238 words
Apparatus for producing uniform textile slivers comprising: a sliver feeding device (1); a sliver receiving device (49); separate electric motors (10 and 51'' or 10'' and 51) for driving said feeding and said receiving devices, one motor being of constant speed and the other of variable speed; a sliver sensing device (12, 13) intermediate said feeding and receiving devices; a draft control device (19) controlled by said sensing device, an intermediate sliver storage device (40) intermediate said feeding and receiving devices, and means (41, 42) for detecting the level of sliver therein, said detecting means being operatively connected to a charging level control device (44) for controlling said variable speed motor whereby to maintain a substantially constant level of sliver in said storage device; a drafting device intermediate said feeding and receiving devices comprising a pair of driven feed rolls (27) and a pair of driven output rolls (29), one of said pairs of rolls being driven at a substantially constant speed; a second variable speed motor (31) for driving the other of said pairs of rolls and controlled by said draft control device to eliminate sliver unevenness detected by said sensing device; and said draft control device being operatively connected to both variable speed motors whereby their speeds are concurrently controlled by the sliver sensing device and the speed of said first variable speed motor may be varied independently of said sliver level detecting means (41, 42).
Claim 3
Dependent Claim
238 words
Apparatus for producing uniform textile slivers comprising: a sliver feeding device (1); a sliver receiving device (49); separate electric motors (10 and 51'' or 10'' and 51) for driving said feeding and said receiving devices, one motor being of constant speed and the other of variable speed; a sliver sensing device (12, 13) intermediate said feeding and receiving devices; a draft control device (19) controlled by said sensing device, an intermediate sliver storage device (40) intermediate said feeding and receiving devices, and means (41, 42) for detecting the level of sliver therein, said detecting means being operatively connected to a charging level control device (44) for controlling said variable speed motor whereby to maintain a substantially constant level of sliver in said storage device; a drafting device intermediate said feeding and receiving devices comprising a pair of driven feed rolls (27) and a pair of driven output rolls (29), one of said pairs of rolls being driven at a substantially constant speed; a second variable speed motor (31) for driving the other of said pairs of rolls and controlled by said draft control device to eliminate sliver unevenness detected by said sensing device; and said draft control device being operatively connected to both variable speed motors whereby their speeds are concurrently controlled by the sliver sensing device and the speed of said first variable speed motor may be varied independently of said sliver level detecting means (41, 42).
Claim 4
Dependent Claim
238 words
Apparatus for producing uniform textile slivers comprising: a sliver feeding device (1); a sliver receiving device (49); separate electric motors (10 and 51'' or 10'' and 51) for driving said feeding and said receiving devices, one motor being of constant speed and the other of variable speed; a sliver sensing device (12, 13) intermediate said feeding and receiving devices; a draft control device (19) controlled by said sensing device, an intermediate sliver storage device (40) intermediate said feeding and receiving devices, and means (41, 42) for detecting the level of sliver therein, said detecting means being operatively connected to a charging level control device (44) for controlling said variable speed motor whereby to maintain a substantially constant level of sliver in said storage device; a drafting device intermediate said feeding and receiving devices comprising a pair of driven feed rolls (27) and a pair of driven output rolls (29), one of said pairs of rolls being driven at a substantially constant speed; a second variable speed motor (31) for driving the other of said pairs of rolls and controlled by said draft control device to eliminate sliver unevenness detected by said sensing device; and said draft control device being operatively connected to both variable speed motors whereby their speeds are concurrently controlled by the sliver sensing device and the speed of said first variable speed motor may be varied independently of said sliver level detecting means (41, 42).
Claim 5
Dependent Claim
43 words
The apparatus of claim 1, wherein a time delay means (60) is provided between the draft control device and the first named variable speed motor so that there is a time lag between the respective speed changes of the two variable speed motors.
Claim 6
Dependent Claim
223 words
Apparatus for producing uniform textile slivers comprising: a sliver feeding device (1); a sliver receiving device (49); a constant speed electric motor (10) for driving said feeding device (1); a first variable speed electric motor (51'') for driving said receiving device (49); a sliver storage device (40) intermediate said feeding and receiving devices, and means (41, 42) for detecting the level of sliver therein; a drafting device (27, 29) intermediate said feeding and sliver storage devices having a pair of driven feed rolls (27) and a pair of driven output rolls (29), said feed rolls being driven at a substantially constant speed; a second variable speed motor (31) for driving said output rolls; a sliver sensing device (12, 13) intermediate said feeding device and said output rolls; a draft control device (19) controlled by said sensing device, said second variable speed motor being controlled by said draft control device to eliminate sliver unevenness detected by said sensing device; said first variable speed motor being operatively connected to said draft control device whereby it is controlled concurrently with said second variable speed motor by said sensing device, said sliver level detecting means (41, 42) being operatively connected to a charging level control device (44) for controlling said first variable speed motor whereby a substantially constant level of sliver is maintained in said storage device.
Claim 7
Dependent Claim
223 words
Apparatus for producing uniform textile slivers comprising: a sliver feeding device (1); a sliver receiving device (49); a constant speed electric motor (10) for driving said feeding device (1); a first variable speed electric motor (51'') for driving said receiving device (49); a sliver storage device (40) intermediate said feeding and receiving devices, and means (41, 42) for detecting the level of sliver therein; a drafting device (27, 29) intermediate said feeding and sliver storage devices having a pair of driven feed rolls (27) and a pair of driven output rolls (29), said feed rolls being driven at a substantially constant speed; a second variable speed motor (31) for driving said output rolls; a sliver sensing device (12, 13) intermediate said feeding device and said output rolls; a draft control device (19) controlled by said sensing device, said second variable speed motor being controlled by said draft control device to eliminate sliver unevenness detected by said sensing device; said first variable speed motor being operatively connected to said draft control device whereby it is controlled concurrently with said second variable speed motor by said sensing device, said sliver level detecting means (41, 42) being operatively connected to a charging level control device (44) for controlling said first variable speed motor whereby a substantially constant level of sliver is maintained in said storage device.
Claim 8
Dependent Claim
59 words
The apparatus of claim 3 comprising speed measuring means (35, 37) operatively connected with said drafting rolls (27, 29) for monitoring the relative speeds of the two pairs of rolls and for transmitting the readings to the draft control device to vary the speed of said output rolls responsive to any variation in the speed of said feed rolls.
Claim 9
Dependent Claim
14 words
The apparatus of claim 4 in which the speed measuring means includes a tacho-generator.
Claim 10
Dependent Claim
223 words
Apparatus for producing uniform textile slivers comprising: a sliver feeding device (1), a sliver receiving device (49); a constant speed electric motor (51) for driving said receiving device (49); a first variable speed motor (10'') for driving said feeding device (1); a sliver storage device (40) intermediate said feeding and receiving devices, and means (41, 42) for detecting the level of sliver therein; a drafting device (27, 29) intermediate said sliver storage and receiving devices, having a pair of driven feed rolls (27) and a pair of driven output rolls (29), said output rolls being driven at a substantially constant speed; a second variable speed motor (31) for driving said feed rolls, a sliver sensing device (12, 13) intermediate said feeding device and said output rolls; a draft control device (19) controlled by said sensing device, said second variable speed motor being controlled by said draft control device to eliminate sliver unevenness detected by said sensing device; said first variable speed motor being operatively connected to said draft control device (19) whereby it is controlled concurrently with said second variable speed motor by said sensing device, said sliver level detecting means (41, 42) being operatively connected to a charging level control device (44) for controlling said first variable speed motor whereby a substantially constant level of sliver is maintained in said storage device.
Claim 11
Dependent Claim
223 words
Apparatus for producing uniform textile slivers comprising: a sliver feeding device (1), a sliver receiving device (49); a constant speed electric motor (51) for driving said receiving device (49); a first variable speed motor (10'') for driving said feeding device (1); a sliver storage device (40) intermediate said feeding and receiving devices, and means (41, 42) for detecting the level of sliver therein; a drafting device (27, 29) intermediate said sliver storage and receiving devices, having a pair of driven feed rolls (27) and a pair of driven output rolls (29), said output rolls being driven at a substantially constant speed; a second variable speed motor (31) for driving said feed rolls, a sliver sensing device (12, 13) intermediate said feeding device and said output rolls; a draft control device (19) controlled by said sensing device, said second variable speed motor being controlled by said draft control device to eliminate sliver unevenness detected by said sensing device; said first variable speed motor being operatively connected to said draft control device (19) whereby it is controlled concurrently with said second variable speed motor by said sensing device, said sliver level detecting means (41, 42) being operatively connected to a charging level control device (44) for controlling said first variable speed motor whereby a substantially constant level of sliver is maintained in said storage device.
Claim 12
Dependent Claim
59 words
The apparatus of claim 6 comprising speed measuring means (35, 37) operatively associated with said drafting rolls (27, 29) for monitoring the relative speeds of the two pairs of rolls and for transmitting the readings to the draft control device to vary the speed of said feed rolls responsive to any variation in the speed of said output rolls.
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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |