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US3927699A Expired / Lapsed US ⏱️ 0.0 years remaining

Weft carrier control apparatus

Assignee: Draper Corp
•
Filing: 1974-10-29
•
Granted: 1975-12-23
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Expires: 1994-10-29
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Abstract

Abstract An improved control apparatus for controlling actuation of the gripper finger of a weft extending carrier in a shuttleless loom of the gripper type. The apparatus being adapted to control actuation of the gripper finger to release the weft which was held thereby while being drawn through the shed and to prevent its actuation during the carrier''s movement toward the shed to receive the next pick of weft.

Inventors

  • 👤 Richard Louis Volpe

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 09:01
CPC Classifications
D; D03; D03D; D03D47/00; D03D47/12; D03D47/20; D03D47/23; D03D47/236

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 234 words
In a shuttleless loom of the type for inserting single picks of weft into separate sheds of warp threads by opposed reciprocating carrier members carried on the free ends of flexible tapes, an improved apparatus for controlling the actuation of the gripper finger of the weft extending carrier comprising: a. camming means mounted on said loom in a manner providing for movement between an operative position where it is contacted by the weft carrier to releast weft from the gripper finger and in inoperative position where no contact causing operation of the gripper finger is effected; b. means defining an off set lip forming one end of the gripper finger disposed for operative engagement with said camming means having; 1. a forward vertical side defining a first cam engaging surface for actuating the gripper finger to release the weft as the carrier is being withdrawn from the shed; 2. an upper horizontal surface with a downwardly tapered leading end defining a second cam engaging surface for displacing said camming means to prevent actuation of the gripper finger during movement of the carrier into the shed, said camming means including: A. a biasing means for returning said camming means to its operating position after being displaced by said second cam engaging surface; and B. a further biasing means for continually urging said camming means toward its position of engagement with said first cam engaging surface.
Claim 2
Dependent Claim 234 words
In a shuttleless loom of the type for inserting single picks of weft into separate sheds of warp threads by opposed reciprocating carrier members carried on the free ends of flexible tapes, an improved apparatus for controlling the actuation of the gripper finger of the weft extending carrier comprising: a. camming means mounted on said loom in a manner providing for movement between an operative position where it is contacted by the weft carrier to releast weft from the gripper finger and in inoperative position where no contact causing operation of the gripper finger is effected; b. means defining an off set lip forming one end of the gripper finger disposed for operative engagement with said camming means having; 1. a forward vertical side defining a first cam engaging surface for actuating the gripper finger to release the weft as the carrier is being withdrawn from the shed; 2. an upper horizontal surface with a downwardly tapered leading end defining a second cam engaging surface for displacing said camming means to prevent actuation of the gripper finger during movement of the carrier into the shed, said camming means including: A. a biasing means for returning said camming means to its operating position after being displaced by said second cam engaging surface; and B. a further biasing means for continually urging said camming means toward its position of engagement with said first cam engaging surface.
Claim 3
Dependent Claim 85 words
an upper horizontal surface with a downwardly tapered leading end defining a second cam engaging surface for displacing said camming means to prevent actuation of the gripper finger during movement of the carrier into the shed, said camming means including: A. a biasing means for returning said camming means to its operating position after being displaced by said second cam engaging surface; and B. a further biasing means for continually urging said camming means toward its position of engagement with said first cam engaging surface.
Claim 4
Dependent Claim 85 words
an upper horizontal surface with a downwardly tapered leading end defining a second cam engaging surface for displacing said camming means to prevent actuation of the gripper finger during movement of the carrier into the shed, said camming means including: A. a biasing means for returning said camming means to its operating position after being displaced by said second cam engaging surface; and B. a further biasing means for continually urging said camming means toward its position of engagement with said first cam engaging surface.

References Cited (Backward Citations)

US2752955A Cited
US3578031A Cited
US3613740A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-12-22 1979-06-23 1979-12-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-12-22 1983-06-23 1983-12-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-12-22 1987-06-23 1987-12-23 $7700.00 Window Closed / Lapsed

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