US3662785A - Gripper head for use in a shuttleless loom - Google Patents

Gripper head for use in a shuttleless loom Download PDF

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Publication number
US3662785A
US3662785A US27225A US3662785DA US3662785A US 3662785 A US3662785 A US 3662785A US 27225 A US27225 A US 27225A US 3662785D A US3662785D A US 3662785DA US 3662785 A US3662785 A US 3662785A
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US
United States
Prior art keywords
clamping
gripper head
ring
gripper
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US27225A
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English (en)
Inventor
Nikolaus Kokkinis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE1956553A external-priority patent/DE1956553C3/de
Application filed by Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Application granted granted Critical
Publication of US3662785A publication Critical patent/US3662785A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers

Definitions

  • This invention relates to an improved gripper head for use in a [52] U.S. Cl. ....l39/l22 N Shuttleless loom the gripper head having a Pair of Clamping [51] Int. Cl.
  • one gripper rod is mounted on each side of the loom, advanced into the shed a from the side, and again retracted.
  • Mounted at the front ends of the gripper rods are gripper heads which grip the weft thread to be introduced into the shed and guide the same during the inserting operation. At that time, the weft thread is drawn off of a large supply spool mounted outside of the shed.
  • Copending application Ser. No. 3,902, filed Jan. I9, 1970 discloses a weft thread-inserting device which permits an improved thread transfer.
  • the clamping levers are constructed as two-armed levers upon one arm of which the control levers will come to be positioned. The control levers engage, for this purpose, from the outside through the warp threads of the loom.
  • the clamping portion itself is prismatic in configuration, thereby forming a kind of edge which, in the position of rest thereof, comes to be placed against a counter-element in the form of a prism bed.
  • This prismatic bed is positioned in a lateral plate at the gripper head wall.
  • the thread is bent at that point, which possibly can be disadvantageous in the case of delicate weft threads.
  • it is also known to dispose a resilient surface under the prismatic edge of the clamping part, for example a'plastic portion. This affords an improvement but this solution is not fully satisfactory for other reasons.
  • the present invention constitutes a great simplification in construction while utilizing' the advantages of a resilient counter-element for the clamping portion, and furthermore provides a solution which does not entail the disadvantages described above.
  • the plate secured to the gripper head is graduated at the edge thereof, at least partially, and a ring of resilient material is placed into the gap produced between the gripper head wall and the plate, the ring of resilient material acting as a counter-element for the clamping lever moved within the gap.
  • FIG. 1 illustrates a gripper head with a clamping device according to the present invention in the closed position
  • FIG. 2 illustrates the clamping device of FIG. 1 in the open position
  • FIG. 3 is a view in cross-section through the clamping device taken along line A-B of FIG. 1,
  • FIG. 4 and FIG. 5 are two different side views of the clamping plate.
  • FIG. 6 is a perspective view of the clamping plate
  • FIGS. 1 and 2 show the mounting of the clamping device at the gripper head 1.
  • the gripper head 1 includes, at the foremost end thereof, a tip 2 which is shaped toward the rear thereof in a hook-like fashion. This point has been identified with reference numeral 2.
  • the clamping lever itself is constructed two-armed and is pivotally mounted about an axis of rotation 5.
  • the arm or jaw 3 of the clamping lever pointing toward the gripper tip constitutes the clamping part proper, whereas the rearwardly pointing arm 4 serves as a seat for the control levers (not shown).
  • a leaf-type spring 10 is shown positioned below the lever arm 4, which spring returns the clamping lever into the clamping position thereof when the control levers have lifted off of the arm 4.
  • clamping plate 6 Secured to the side wall of the gripper head 1 is a clamping plate 6 in proximity to the tip 2.
  • the clamping plate 6 is secured to the side of the gripper head 1 by means of the screws 8, for example.
  • the shape or configuration of the clamping plate may be in principle selected as desired. In this case, it is matched to the shape of the gripper tip 2 and is therefore tapered in front at the underside thereof in accordance with the extension of the gripper tip.
  • the clamping plate 6 is slightly thicker than the resilient ring 9 is wide and it is therefore possible to provide, in addition to the resilient ring, also graduations and projections 7 at the clamping plate 6.
  • the projecting rim at the clamping plate extends essentially in the portion pointing toward the gripper tip 2.
  • the clamping plate also includes a flat, graduated and linear portion 6' upon which the ring 9 is mounted.
  • the rim and the projection 7 on the one hand and the wall of the gripper head 1 on the other hand form a gap within which the movable clamping portion 3 is adapted to move.
  • the resilient ring 9 is positioned in this gap and secured against sliding off by means of the projection
  • the rim of the clamping part, with the exception of the projection 7, is lower than the periphery of the ring 9. For this reason the weft thread, when clamped in, will contact only the resilient ring 9 and the movable clamping portion 3. Thus, it does not undergo any damage by contacting any of the remaining parts of the clamping plate.
  • FIG. 4 is a side view of a clamping plate from the opposite side.
  • FIG.,4 shows, in phantom, the graduation on the clamping plate along the edge thereof pointing towards the left. This graduation is equally apparent from FIG. 5 in which it is drawn in solid lines. The graduation is so constructed that the upwardly positioned portion 6' extends in a rectilinear manner, thus forming a straight counter-element for the clamping portion or jaw 3.
  • FIG. 5 also shows, in dashdotted lines, how a ring 9 from a resilient material, for example a plastic, may be placed around the graduation of the clamping plate 6.
  • the ring 9 is mounted relatively loosely on the graduation so that it is easily displaceable.
  • the marginal projection opposite the graduation for example at 6', is approximately as wide as the ring 9.
  • the ring 9 is thereby retained in position and cannot slide off the clamping plate, whereas this construction does permit a slippage of the ring on the graduated surface of the plate.
  • FIG. 3 is a view in cross-section of the gap between the gripper head 1 and the projection 7 of the clamping plate 6.
  • the clamping plate is mounted laterally parallel to the wall of the gripper head 1. This crosssectional view clearly shows the graduation 6' around which the ring 9 is placed.
  • the clamping portion or jaw 3 of the clamping device or mechanism is adapted to be moved up and down, as shown by the arrows.
  • the ring 9 serves as a counter-element for the clamping portion or jaw 3 and it can be applied or placed in position very easily. More importantly, it can be adjusted very easily without major difficulties if any damage should occur at any point. For this purpose, removal of the clamping plate is not necessary, as has been set forth above.
  • a gripper head for a shuttleless loom said gripper head having a fixed jaw and a movable jaw for weft thread and hook means on said fixed jaw, the improvement comprising a displaceable ring of resilient material supported on a ledge on a plate detachably secured to said fixed jaw and extending opposite the movable jaw in a rectilinear manner, and the side of the plate adjacent a part of the ring having the same height as the ring.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US27225A 1969-11-11 1970-04-10 Gripper head for use in a shuttleless loom Expired - Lifetime US3662785A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1956553A DE1956553C3 (de) 1967-04-04 1969-11-11 Schußfadeneintragvorrichtung für schützenlose Webmaschinen

Publications (1)

Publication Number Publication Date
US3662785A true US3662785A (en) 1972-05-16

Family

ID=5750702

Family Applications (1)

Application Number Title Priority Date Filing Date
US27225A Expired - Lifetime US3662785A (en) 1969-11-11 1970-04-10 Gripper head for use in a shuttleless loom

Country Status (5)

Country Link
US (1) US3662785A (enrdf_load_stackoverflow)
BE (1) BE746506R (enrdf_load_stackoverflow)
BG (1) BG17344A3 (enrdf_load_stackoverflow)
FR (1) FR2058019A6 (enrdf_load_stackoverflow)
GB (1) GB1279197A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851676A (en) * 1972-08-14 1974-12-03 Dornier Gmbh Lindauer Weft thread inserting device for shuttleless looms
US3986532A (en) * 1975-09-23 1976-10-19 Rockwell International Corporation Weft extending carrier
US4117871A (en) * 1976-06-03 1978-10-03 Sulzer Brothers Limited Yarn clamp for a weaving machine
US4434817A (en) 1981-01-12 1984-03-06 Sulzer Brothers Ltd. Edge yarn clamp for a weaving machine
US20040173278A1 (en) * 2001-03-21 2004-09-09 Denis Moeneclaey Rapier for a rapier loom
US20050257849A1 (en) * 2004-05-19 2005-11-24 Dominique Maes Pneumatically controllable weft thread clamp for a weaving machine
US20130199659A1 (en) * 2010-11-18 2013-08-08 Lindauer Dornier Gesellschaft Mbh Gripper Head for the Insertion of Weft Threads on a Gripper Weaving Machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH611354A5 (enrdf_load_stackoverflow) * 1975-04-17 1979-05-31 Dornier Gmbh Lindauer
GB1582326A (en) * 1976-04-09 1981-01-07 Mackie & Sons Ltd J Looms
CH633589A5 (de) * 1978-11-15 1982-12-15 Saurer Ag Adolph Fadenklemme.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3532136A (en) * 1967-07-13 1970-10-06 Ramon Balaguer Golobart Organs for grasping woof threads in inserting elements of stationary woof frames

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3532136A (en) * 1967-07-13 1970-10-06 Ramon Balaguer Golobart Organs for grasping woof threads in inserting elements of stationary woof frames

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851676A (en) * 1972-08-14 1974-12-03 Dornier Gmbh Lindauer Weft thread inserting device for shuttleless looms
US3986532A (en) * 1975-09-23 1976-10-19 Rockwell International Corporation Weft extending carrier
US4117871A (en) * 1976-06-03 1978-10-03 Sulzer Brothers Limited Yarn clamp for a weaving machine
US4434817A (en) 1981-01-12 1984-03-06 Sulzer Brothers Ltd. Edge yarn clamp for a weaving machine
US20040173278A1 (en) * 2001-03-21 2004-09-09 Denis Moeneclaey Rapier for a rapier loom
US6866069B2 (en) * 2001-03-21 2005-03-15 Picanol N.V. Rapier for a rapier loom
US20050257849A1 (en) * 2004-05-19 2005-11-24 Dominique Maes Pneumatically controllable weft thread clamp for a weaving machine
US7219702B2 (en) * 2004-05-19 2007-05-22 N.V. Michel Van De Wiele Pneumatically controllable weft thread clamp for a weaving machine
US20130199659A1 (en) * 2010-11-18 2013-08-08 Lindauer Dornier Gesellschaft Mbh Gripper Head for the Insertion of Weft Threads on a Gripper Weaving Machine
US8875747B2 (en) * 2010-11-18 2014-11-04 Lindauer Dornier Gesellschaft Mbh Gripper head for the insertion of weft threads on a gripper weaving machine

Also Published As

Publication number Publication date
BG17344A3 (bg) 1973-07-25
GB1279197A (en) 1972-06-28
FR2058019A6 (enrdf_load_stackoverflow) 1971-05-21
BE746506R (fr) 1970-07-31

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