US3464453A - Gripping shuttle loom - Google Patents
Gripping shuttle loom Download PDFInfo
- Publication number
- US3464453A US3464453A US674368A US3464453DA US3464453A US 3464453 A US3464453 A US 3464453A US 674368 A US674368 A US 674368A US 3464453D A US3464453D A US 3464453DA US 3464453 A US3464453 A US 3464453A
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- US
- United States
- Prior art keywords
- shuttle
- presser
- weft
- lever
- gripping
- 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
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- 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
- D03D47/40—Forming selvedges
-
- 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
Definitions
- a second retaining device for the weft is equipped with a clamping device for receiving a portion of the weft.
- Said clamping device comprises a presser which is biased onto the weft portion to hold the weft temporarily in position. The presser is moved into and out of an activated position by means responding to the operation of the loom and is released from this position into a clamping position and moved out of the clamping position by means responding to actuation by the shuttle.
- This invention relates to a gripping shuttle loom with a retaining device provided on the gripping shuttle to retain the beginning of the weft when the weft is being inserted into the shed, and a second retaining device which does not move in the direction of the weft and which engages the weft until the weft is bound into the shed.
- the second retaining device is released by means of a driven member.
- both the release and the subsequent disengagement of a second retaining device is eifected by adjusting means which are in positive operative connection with the machine drive.
- This construction produces an uncertainty in the operation of the second retaining device and there is no proper coordination between the movement of the gripping shuttle and the operation of the second retaining device. If, for example, the gripping shuttle is delayed, the second retaining device may have already been released so that it will no longer engage the beginning of the weft. If, on the other hand, the gripping shuttle arrives too early, the second retaining device will not be ready to engage the beginning of the weft. In either case, it is conceivable that the retaining device of the gripping shuttle will release the beginning of the weft without the weft first being engaged by the second retaining device.
- the gripping shuttle operates as the release member for the second retaining device. In this manner, a satisfactory transfer of the beginning of the weft from the retaining device of the gripping shuttle to the second retaining device is insured at each weft insertion. This transfer is very important in gripping shuttle looms.
- the time of the blow of the slay and the time of the change of the shed are constant. It is, therefore, advisable to make the release of the beginning of the weft by the second retaining device independent of the arrival of the shuttle.
- the second retaining device can be a mechanical or pneumatic device. Several embodiments of this second retaining device will be described in the specification below.
- FIGS. 1 to 4 show one embodiment of this invention in which the second retaining device is arranged for movement on the machine frame above the shed.
- FIGS. 5 and 6 show another embodiment of this invention in which the second retaining device is similar to the one shown in FIGS. 1 to 4.
- FIGS. 7 and 8 show a further modification of this invention similar to that shown in FIGS. 5 and 6.
- a gripping shuttle loom uses a gripping shuttle for the insertion of a single weft from both sides.
- the specific structure of the gripping shuttle is only of secondary importance to the present invention. Thus it may have any desired structure, as for instance the one disclosed in U .S. Patent 2,168,420.
- one second retaining device each is provided on each side of the loom, one being etfective when the shuttle leaves the shed on one side, the other when the shuttle leaves the shed on the other side.
- the retaining device shown in FIGS. 1 through 4 is positioned above the shed; and just outside the warp edge of the fabric being woven.
- the presser 11d is in the form of a reed, yas shown in FIGURES 1 and 4, and is mounted on a lever 58d which is pivoted about a pin 59d extending parallel to the weft direction.
- the reed-shaped presser 11d is held in operating or weft retaining position by a torsion spring 60d so designed that it normally urges presser 11d into engagement with the shuttle track 19d and transversely to the direction of movement of the shuttle 1d. (See FIGS.
- Pin 59d is positioned on slide 61a' which moves back ⁇ and forth perpendicularly to the reed in the direction of the double arrow shown in FIG. 1.
- Slide 61d receives its driving force from a. cam disc similar to disc 201' in FIG. 27 shown in the parent patent.
- a roll 62d is tixedly mounted on the machine frame. Roll 62d cooperates with the bottom edge of lever 58d which is formed like a cam.
- a latch 63d is provided which is mounted pivotally on a journal 64d. Journal 64d carries a torsion spring 65d which holds latch 63d in the operating position. In this position latch 63d engages the bottom edge of lever 58d (see FIG. 1).
- the adjusting lever 17d which cooperates with the adjusting member 18d of the gripping shuttle 1d, is connected for movement with the latch 63d (see FIG. 3). When adjusting member 18d 3 engages the adjusting lever 17d, latch 63d is moved into the position shown in FIG.
- lever 58d is moved out of contact with the roll 62d by moving slide 61d in the direction toward the reed.
- slide 61d moves back whereby the roll 62d moves lever 58d of presser 11d upwardly.
- the flipper edge of lever 58d engages a cam 66d disposed on the lower portion of the hook of latch 63d whereby the latch 63d is moved clockwise and locks with the lever 58d.
- latch 63d has already been returned by means of a compression spring 65d which acts immediately after the adjusting member 18d of the gripping shuttle 1d has passed the adjusting lever 17d.
- a second cam 67d (see FIG. 3) is provided above the hook of latch 63d.
- lever 58d is moved upwardly by means of roll 62d, whereby the adjusting lever 17d is temporarily moved into a position to permit the passage of gripping shuttle 1d.
- a stop pin 68d (see FIG. 3) is mounted on the latch 63d to determine the operating position of the latch 63d and adjusting lever 17d while the slide 61d acts Ias an abutment for stop pin 68d.
- FIGS. 5 and 6 corresponds substantially to that shown in FIGS. 1 through 4.
- Presser 11e is formed by the free end of a spring rod 69e with an initial stress directed both toward the center of the fabric and downward.
- the spring rod 61e is ywound to a torsion spring 70e, and is mounted on a bolt 71e of the slide 61e.
- the free end of the torsion spring 70e is connected to an adjusting spring 72e whereby the presser 11e is held in the lowered operating or weft retaining position as shown in FIG. 6.
- the spring rod is bent to the inside at the head of torsion spring 70e.
- the spring rod 69e engages a guide 73e provided on the right hand side of the slide 61e.
- a supporting member 76e is -disposed below spring rod 69e (see FIG. 5).
- spring rod 69e presses upon supporting member 76e whereby the presser 11e is in its yupper position.
- the adjusting member 18e is mounted on the upper portion of the gripping shuttle 1e. Before the arrival of gripping shuttle 1e, slide 61e is moved in the direction towards the reed.
- Spring rod 69e is thus Areleased from the support member 76e and is urged on the locking edge 75e (see FIG. 18).
- the spring rod 69e is bent outwardly and moves in the range of slot 74e.
- spring rod 69e moves downwardly into slot 74e and assumes the operating position shown in FIG. 6.
- slide 61e is pulled back whereby the supporting member 76e releases the spring rod y69e which in turn moves back into locking edge 75e.
- the retention of the weft head is achieved in this embodiment by the free end of spring rod 69e. As shown in FIGS. 7 and 8, this can also be additionally eifected by an extension 77 f Iwhich adjoins the part of the spring rod 69j forming the presser 11j and extends in the weft direc tion.
- the extension 77j is arranged above the fupper shed and presses the beginning of the weft over the warps of the shed together with presser 11j against the abutment surface of shuttle track 19j.
- a warp in which sheds are formed a warp in which sheds are formed, a slay yand a gripping shuttle movable through the sheds, a clamping device for receiving a portion of a weft from the gripping shuttle upon the latter leaving a shed and for retaining the same until the change of the shed, said clamping device comprising a presser, spring means for biasing said presser downwardly onto the weft portion, lever means carrying said presser and tiltable about an axis parallel to the direction of movement of the shuttle, a slide movable transversely to the path of the shuttle, a holding device carried by the slide for holding said presser in a lifted weft releasing position, a stationary support arranged below said lever means for causing said presser to return to said lifted position during a movement transverse to the path of the shuttle, and means for moving said slide toward the slay to allow said presser to move from said lifted position to a clamping position and for moving said slide in the opposite direction to cause the presser to move
- said holding device includes an arresting lever tiltably supported at said slide.
- said arresting lever comprises a cam by means of which the adjusting lever is tiltable by said lever means out of the path of movement of the gripping shuttle during its lifting movement by said stationary support.
- lever means carrying said presser comprises a spring rod which is biased in a direction toward the slay.
- said holding device comprises a guide connected to the slide and provided with an opening for receiving therethrough said spring rod, said opening including a substantially vertically extending slot and being conned in part by a substantially horizontally extending rest surface with an end stop remote from said slot, said spring rod being biased towards the center of the shed and operable to manually rest on said rest surface against said stop.
- said presser is formed by the free end of said spring rod and comprises an extension extending across ⁇ a section of the upper portion of the shed and in the direction of movement of the gripping shuttle.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Description
Sept. 2, 1969 F, 5CH|LDE ETAL 3,464,453
GRPPIEG SHUTTLE LOM original Filed sept. 1e, 1965 5 Sheets-Sheet 1 INVENTORS FRITZ .SCHILDE etal sept 2, 1969 F. SCHILDE ETAL SHIPPING SHUTTLE LOOM Original Filed Sept. 16, 1965 5 Sheets-Sheet 2 INVENTORS FRITZ SCHILDE e101 Sept. 2, 1969 F SCH|LDE ET AL 3,464,453
GRIPPING SHUTTLELOOM v Original Filed Sept. 16, 1965 5 Sheets-Sheet 5 INVENTORS FRITZ lSCHILDE e1 cl U.S. Cl. 139-125 10 Claims ABSTRACT OF THE DISCLOSURE In a loom a second retaining device for the weft is equipped with a clamping device for receiving a portion of the weft. Said clamping device comprises a presser which is biased onto the weft portion to hold the weft temporarily in position. The presser is moved into and out of an activated position by means responding to the operation of the loom and is released from this position into a clamping position and moved out of the clamping position by means responding to actuation by the shuttle.
This is a divisional application of copending application Ser. No. 487,659, led Sept. 16, 1965, and now abandoned.
This invention relates to a gripping shuttle loom with a retaining device provided on the gripping shuttle to retain the beginning of the weft when the weft is being inserted into the shed, and a second retaining device which does not move in the direction of the weft and which engages the weft until the weft is bound into the shed. The second retaining device is released by means of a driven member.
Under the present construction of gripping shuttle looms both the release and the subsequent disengagement of a second retaining device is eifected by adjusting means which are in positive operative connection with the machine drive. This construction produces an uncertainty in the operation of the second retaining device and there is no proper coordination between the movement of the gripping shuttle and the operation of the second retaining device. If, for example, the gripping shuttle is delayed, the second retaining device may have already been released so that it will no longer engage the beginning of the weft. If, on the other hand, the gripping shuttle arrives too early, the second retaining device will not be ready to engage the beginning of the weft. In either case, it is conceivable that the retaining device of the gripping shuttle will release the beginning of the weft without the weft first being engaged by the second retaining device.
These disadvantages of known gripping shuttle looms are eliminated by this invention in that the release of a second retaining device is made to correspond with the arrival of the gripping shuttle so that a proper sequence of operation between the gripping shuttle and the second retaining device is assured.
This object is achieved, according to the invention, in that the gripping shuttle operates as the release member for the second retaining device. In this manner, a satisfactory transfer of the beginning of the weft from the retaining device of the gripping shuttle to the second retaining device is insured at each weft insertion. This transfer is very important in gripping shuttle looms.
It is another object of the invention to provide a loom in which the gripping shuttle merely represents the release member for the second retaining device, and that States Patent Patented Sept. 2, 1969 the second retaining device is associated with an adjusting member whose movement depends on the machine drive, to place the second retaining device in the inoperative position after it has been released. In contrast to the time of the arrival of the shuttle, the time of the blow of the slay and the time of the change of the shed are constant. It is, therefore, advisable to make the release of the beginning of the weft by the second retaining device independent of the arrival of the shuttle.
It is, therefore, a further object of this invention to provide for the release of the beginning of the weft by the second retaining device to be independent of the shuttle arrival.
The second retaining device can be a mechanical or pneumatic device. Several embodiments of this second retaining device will be described in the specification below.
A more complete understanding of this invention and of the several embodiments which represents the invention will be had by reference to the drawings attached hereto studied in conjunction with the following complete specication and appended claims.
FIGS. 1 to 4 show one embodiment of this invention in which the second retaining device is arranged for movement on the machine frame above the shed.
FIGS. 5 and 6 show another embodiment of this invention in which the second retaining device is similar to the one shown in FIGS. 1 to 4.
FIGS. 7 and 8 show a further modification of this invention similar to that shown in FIGS. 5 and 6.
In general, a gripping shuttle loom uses a gripping shuttle for the insertion of a single weft from both sides. The specific structure of the gripping shuttle is only of secondary importance to the present invention. Thus it may have any desired structure, as for instance the one disclosed in U .S. Patent 2,168,420.
It is to be understood that one second retaining device each is provided on each side of the loom, one being etfective when the shuttle leaves the shed on one side, the other when the shuttle leaves the shed on the other side.
The retaining device shown in FIGS. 1 through 4, is positioned above the shed; and just outside the warp edge of the fabric being woven. The presser 11d is in the form of a reed, yas shown in FIGURES 1 and 4, and is mounted on a lever 58d which is pivoted about a pin 59d extending parallel to the weft direction. The reed-shaped presser 11d is held in operating or weft retaining position by a torsion spring 60d so designed that it normally urges presser 11d into engagement with the shuttle track 19d and transversely to the direction of movement of the shuttle 1d. (See FIGS. 3 and 4.) Pin 59d is positioned on slide 61a' which moves back `and forth perpendicularly to the reed in the direction of the double arrow shown in FIG. 1. Slide 61d receives its driving force from a. cam disc similar to disc 201' in FIG. 27 shown in the parent patent. For positioning the lever 58d which carries presser 11d, a roll 62d is tixedly mounted on the machine frame. Roll 62d cooperates with the bottom edge of lever 58d which is formed like a cam. During the forward movement of slide 61d lever 58d moves into an operating position shown in FIG. 2 despite the presence of roll 62d', and is moved into the inoperative or weft releasing position shown in FIG. 1 by roll 62d during the return movement of slide 61d. In Order to retain the lever 58d in the inoperative position, a latch 63d is provided which is mounted pivotally on a journal 64d. Journal 64d carries a torsion spring 65d which holds latch 63d in the operating position. In this position latch 63d engages the bottom edge of lever 58d (see FIG. 1). The adjusting lever 17d, which cooperates with the adjusting member 18d of the gripping shuttle 1d, is connected for movement with the latch 63d (see FIG. 3). When adjusting member 18d 3 engages the adjusting lever 17d, latch 63d is moved into the position shown in FIG. 3 and lever 58d, along with the reed-shaped presser 11d, is subject to the inuence of the torsion spring 60d. Lever 58d is moved out of contact with the roll 62d by moving slide 61d in the direction toward the reed. Before the gripping shuttle 1d is actuated again slide 61d moves back whereby the roll 62d moves lever 58d of presser 11d upwardly. The flipper edge of lever 58d engages a cam 66d disposed on the lower portion of the hook of latch 63d whereby the latch 63d is moved clockwise and locks with the lever 58d. It should be noted that latch 63d has already been returned by means of a compression spring 65d which acts immediately after the adjusting member 18d of the gripping shuttle 1d has passed the adjusting lever 17d.
The adjusting lever 17d is thereby moved into its operating position. To insure that the adjusting lever 17d is moved from the path of the gripping shuttle before the gripping shuttle is actuated, a second cam 67d (see FIG. 3) is provided above the hook of latch 63d. Thereafter, lever 58d is moved upwardly by means of roll 62d, whereby the adjusting lever 17d is temporarily moved into a position to permit the passage of gripping shuttle 1d. A stop pin 68d (see FIG. 3) is mounted on the latch 63d to determine the operating position of the latch 63d and adjusting lever 17d while the slide 61d acts Ias an abutment for stop pin 68d. This arrangement insures a cooperation between the lever 58d and the cam 66d when lever 58d is moved upwardly by the roll 62d. In the embodiment shown in FIGS. l to 4 the presser 11d cooperates with shuttle track 19d as an abutment in the same manner as shown in FIGS. 1 to 5 of the parent patent.
The embodiment shown in FIGS. 5 and 6 corresponds substantially to that shown in FIGS. 1 through 4. Presser 11e, however, is formed by the free end of a spring rod 69e with an initial stress directed both toward the center of the fabric and downward. At the far end of presser 11e, the spring rod 61e is ywound to a torsion spring 70e, and is mounted on a bolt 71e of the slide 61e. The free end of the torsion spring 70e is connected to an adjusting spring 72e whereby the presser 11e is held in the lowered operating or weft retaining position as shown in FIG. 6. For the initial stress of spring rod 69e towards the fabric center, the spring rod is bent to the inside at the head of torsion spring 70e. The spring rod 69e engages a guide 73e provided on the right hand side of the slide 61e. A vertical slot 74e and a horizontal locking edge 75e, arranged above and inside slot 74e, are provided in guide 73e (FIG. 5). A supporting member 76e is -disposed below spring rod 69e (see FIG. 5). In the inoperative or weft releasing position spring rod 69e presses upon supporting member 76e whereby the presser 11e is in its yupper position. The adjusting member 18e is mounted on the upper portion of the gripping shuttle 1e. Before the arrival of gripping shuttle 1e, slide 61e is moved in the direction towards the reed. Spring rod 69e is thus Areleased from the support member 76e and is urged on the locking edge 75e (see FIG. 18). When adjusting member 61e of the gripping shuttle 1e engages the presser 11e, the spring rod 69e is bent outwardly and moves in the range of slot 74e. As soon -as adjusting member 18e of gripping shuttle 1e moves under presser 11e, spring rod 69e moves downwardly into slot 74e and assumes the operating position shown in FIG. 6. To return spring rod 69e to the inoperative position, slide 61e is pulled back whereby the supporting member 76e releases the spring rod y69e which in turn moves back into locking edge 75e.
The retention of the weft head is achieved in this embodiment by the free end of spring rod 69e. As shown in FIGS. 7 and 8, this can also be additionally eifected by an extension 77 f Iwhich adjoins the part of the spring rod 69j forming the presser 11j and extends in the weft direc tion. The extension 77j, is arranged above the fupper shed and presses the beginning of the weft over the warps of the shed together with presser 11j against the abutment surface of shuttle track 19j.
It is to be understood that the embodiments herein are shown merely for illustrative purposes and that the invention is not to be limited to these embodiments alone, but rather by the claims appended below.
What is claimed is:
1. In a loom, a warp in which sheds are formed, a slay yand a gripping shuttle movable through the sheds, a clamping device for receiving a portion of a weft from the gripping shuttle upon the latter leaving a shed and for retaining the same until the change of the shed, said clamping device comprising a presser, spring means for biasing said presser downwardly onto the weft portion, lever means carrying said presser and tiltable about an axis parallel to the direction of movement of the shuttle, a slide movable transversely to the path of the shuttle, a holding device carried by the slide for holding said presser in a lifted weft releasing position, a stationary support arranged below said lever means for causing said presser to return to said lifted position during a movement transverse to the path of the shuttle, and means for moving said slide toward the slay to allow said presser to move from said lifted position to a clamping position and for moving said slide in the opposite direction to cause the presser to move to the releasing position.
2. The arrangement according to claim 1, wherein said holding device includes an arresting lever tiltably supported at said slide.
3. The arrangement according to claim 2, which includes an adjusting lever connected for movement with said arresting lever and operable to move the latter away from the slay in response to actuation by said shuttle.
4. The arrangement according to claim 2, wherein said arresting lever comprises a cam by means of which the adjusting lever is tiltable by said lever means out of the path of movement of the gripping shuttle during its lifting movement by said stationary support.
S. The arrangement according to claim 1, wherein said lever means carrying said presser comprises a spring rod which is biased in a direction toward the slay.
6. The arrangement according to claim S, wherein said presser is formed by the free end of said spring rod.
7. The `arrangement according to claim 5, wherein said holding device comprises a guide connected to the slide and provided with an opening for receiving therethrough said spring rod, said opening including a substantially vertically extending slot and being conned in part by a substantially horizontally extending rest surface with an end stop remote from said slot, said spring rod being biased towards the center of the shed and operable to manually rest on said rest surface against said stop.
8. The arrangement according to claim 1, wherein said presser and said holding device .are arranged within the range of a fabric being woven in the shed,` and wherein said presser is adapted to be moved onto the weft portion through the warp threads of the upper portion of the shed.
9. The arrangement according to claim 8, wherein said presser is formed by the free end of said spring rod and comprises an extension extending across `a section of the upper portion of the shed and in the direction of movement of the gripping shuttle.
10. The arrangement according to claim 8, wherein said presser comprises a comb.
References Cited UNITED STATES PATENTS 2,602,472 7/ 1952 Pfarrwaller 139-194 2,93 8,547 5/ 1960 Dewas 139--122 FOREIGN PATENTS 94,432 4/ 1895 Great Britain.
HENRY S. IAUDON, Primary Examiner i U.S. Cl. X.R.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US67436867A | 1967-08-24 | 1967-08-24 |
Publications (1)
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US3464453A true US3464453A (en) | 1969-09-02 |
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ID=24706308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US674368A Expired - Lifetime US3464453A (en) | 1967-08-24 | 1967-08-24 | Gripping shuttle loom |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4175307A (en) * | 1977-05-10 | 1979-11-27 | Zellweger Uster Ag | Thread gripper |
EP0083905A1 (en) * | 1982-01-13 | 1983-07-20 | GebràDer Sulzer Aktiengesellschaft | Terry loom having an expander device between the reed and the breast beam |
AT378790B (en) * | 1983-06-14 | 1985-09-25 | Saurer Ag Adolph | WEAVING MACHINE, ESPECIALLY FROSTING WEAVING MACHINE |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2602472A (en) * | 1947-06-07 | 1952-07-08 | Sulzer Ag | Method and means for changing the clamping force at which and during each time a weft thread end is temporarily held during weaving on looms |
US2938547A (en) * | 1956-03-20 | 1960-05-31 | Dewas Raymond | Weft holding means for weaving looms with continuous weft feed |
-
1967
- 1967-08-24 US US674368A patent/US3464453A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2602472A (en) * | 1947-06-07 | 1952-07-08 | Sulzer Ag | Method and means for changing the clamping force at which and during each time a weft thread end is temporarily held during weaving on looms |
US2938547A (en) * | 1956-03-20 | 1960-05-31 | Dewas Raymond | Weft holding means for weaving looms with continuous weft feed |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4175307A (en) * | 1977-05-10 | 1979-11-27 | Zellweger Uster Ag | Thread gripper |
EP0083905A1 (en) * | 1982-01-13 | 1983-07-20 | GebràDer Sulzer Aktiengesellschaft | Terry loom having an expander device between the reed and the breast beam |
AT378790B (en) * | 1983-06-14 | 1985-09-25 | Saurer Ag Adolph | WEAVING MACHINE, ESPECIALLY FROSTING WEAVING MACHINE |
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