US3875881A - Separating guide of fabric layers transformable in a straight guide for sewing machines - Google Patents
Separating guide of fabric layers transformable in a straight guide for sewing machines Download PDFInfo
- Publication number
- US3875881A US3875881A US454844A US45484474A US3875881A US 3875881 A US3875881 A US 3875881A US 454844 A US454844 A US 454844A US 45484474 A US45484474 A US 45484474A US 3875881 A US3875881 A US 3875881A
- Authority
- US
- United States
- Prior art keywords
- layers
- guide
- fabric
- plate members
- separating
- 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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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B35/00—Work-feeding or -handling elements not otherwise provided for
- D05B35/10—Edge guides
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
- D05D2207/00—Use of special elements
- D05D2207/02—Pneumatic or hydraulic devices
Definitions
- the present invention pertains to a separating guide for layers of work. convertible into a straight guide, for sewing machinesv
- the separating guides for the layers of work which are adapted to be assembled to a sewing machine have the function of separating the edges of the layers and to allow relative sliding of said edges in order to match them automatically. Without such guides it would not be possible to achieve relative sliding of the edges due to the excessive friction between the layers.
- Said guides are essentially formed by two parallel and superimposed channels which define a C-shaped cross section extending parallel to the direction of movement of the work.
- the aim of the present invention is to eliminate totally the above-mentioned disadvantages and more pre cisely to transform with extreme simplicity a layerseparating guide into a straight guide.
- This purpose is achieved by a separating guide for layers of work which is convertible into a straight guide which is the object of the present invention.
- the guide is characterized by the fact that it includes a housing which is fixed and extends longitudinally perpendicular to the direction of movement of the layer of work. It includes one or more parallel and superimposed channels; one or more plate members located and slidable in said channels, means to extend them from the fixed housing, and means to move the plates within along said channels.
- the plates extending from the fixed housing define in combination with said fixed housing one or more parallel and superimposed C-shaped guides mounted parallel to the direction of movement of the layers of work, and with the plates retracted into the fixed housing define a straight vertical guide in combination with the fixed housing.
- FIG. I shows in perspective the separating guide for the layers of work, applied to a conventional sewing machine
- FIG. 2 shows a perspective view of the guide converted to a straight guide
- FIG. 3 shows the guide in cross section along line III- III in FIG. 1;
- FIG. 4 shows the guide in cross section along line lV-IV in FIG. 2.
- the separating guide for the layers of work in question has been applied to a conventional sewing machine, whose frame consists of a base 1 on which is mounted a standard 2 supporting an arm 3 to whose end is applied a known head 4, said head carrying known upper sewing elements consisting ofa needle 5 as well as a conventional presserbar 6 for supporting a fabric-engaging presserfoot 7 of known type.
- the separating guide for the layers of work is mounted on the conventional work table 8 forward of head 4 and parallel to arm 3 of the sewing machine.
- the separating guide for the layers of work includes a fixed housing 9 which is essentially flat and extends lengthwise perpendicular to the direction of travel of the work.
- Fixed housing 9 contains three planar elements or stationary plates identified by numerals I0, II and 12 respectively, which are spaced and parallel and fixed to the upper surface of the work table 8 by means ofscrews I3.
- channels 10a and 10b formed between one stationary plate and another, are inserted slidable plate members 14 and 15 respectively. and more specifically, slidable plate 14 is inserted in the channel between plate 10 and plate 11 while slidable plate 15 is inserted in the channel between plate 11 and plate 12.
- the slidable plates 14 and 15 are provided with slots I6 and 17 respectively, through which screws 13 extend that include guide rings 18 of anti-friction material assembled thereon which are disposed in correspondence (FIGS. 3 and 4) with said slots I6 and 17.
- Slots ]6 and 17 allow sliding of plates I4 and 15 in the channels between one plate and another so as to allow them to extend from the zone of the stationary plates and to form with the same, two parallel and superimposed guides 19 and 20, the configuration of which defines the letter C (FIG. 3).
- the slidable plates When, on the other hand, the slidable plates are located within the stationary plates, they form a straight vertical guide with said plates which is coplanar and has a guide member 21 attached to plate I0 (FIG. 4).
- Slidable plate 14 is perfectly flat and has a rounded corner into which the layers of work are introduced, and which corresponds to similar corners provided on the stationary plates 10 and 11.
- Slidable plate 15 has an edge which emerges from the fixed housing and turns upwardly so as to facilitate the entry of the layers of work into the guides I9 and 20.
- Slidable plates I5 and 16 are both attached by means of screws 22 to an angle bracket 23 which is supported on piston 24 of a pneumatic cylinder 25 mounted on an integrally formed and upwardly directed bracket 26 of plate 10.
- Plate 10 has two parallel slots 27 in which slide the heads of screws 22.
- Pneumatic cylinder 25 is double-acting and is provided with two hoses 28 and 29 (FIG. 1) coming from a conventional air compressor, not shown.
- An apparatus for guiding a plurality of layers of fabric to be sewn together on a sewing machine work table comprising:
- planar elements define stationary plates disposed in a plane perpendicular to the direction of travel of the lay ers of fabric.
- said moving means includes a pneumatic cylinder having a piston interconnected with said plate members and a control means for selectively actuating said piston for sliding said plate members between their two positions.
- control means includes a manually operable start-stop button operatively connected to said pneumatic cylin-
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
A guide for layers of fabric in a sewing machine which includes fixed housing having spaced and slidable members selectively moveable therein between a first position to form separate superimposed guides for each fabric layer and a second position to form a single or straight guide for all of the fabric layers.
Description
I United States Patent 1191 1111 3,875,881
Marforio 1 Apr. 8, 1975 [54] SEPARATING GUIDE 0F FABRIC LAYERS [56] References Cited TRANSFORMABLE IN A STRAIGHT GUIDE UNITED STATES PATENTS FOR SEWING MACHINES 3,392,691 7/1968 Pope 112/153 75 l N i Marforio. Milan l 3,786,768 1/1974 Kosrow et a1 112/143 73] A v R ld & C S A M1 3.814.039 6/1974 Heller et a1 112/153 ss1 nee: 1r 1m 1m l g 5 p FOREIGN PATENTS OR APPLICATIONS [22) Filed Mar 26 1974 3.495 0/1871 United Kingdom 112/153 [21] App]. No.: 454,844 Primary E.\'aminerH. Hampton Hunter [3'0] Foreign Application Priority Data L d f l EZ T'F h h h gu1 e or ayerso a no in asewmg mac me w 1c May {my 24371/73 includes fixed housing having spaced and slidable [52] U 8 Cl H2/]53 I 2,141 members selectively moveable therein between a first [5 H D65) 35/10 position to form separate superimposed guides for each fabric layer and a second position to form a sin- [58] Fleld of Search 112/153, 152, 141, 142, g or Straight guide for a" of the fabric layers.
4 Claims, 4 Drawing Figures lii SEPARATING GUIDE OF FABRIC LAYERS TRANSFORMABLE IN A STRAIGHT GUIDE FOR SEWING MACHINES BACKGROUND OF THE INVENTION The present invention pertains to a separating guide for layers of work. convertible into a straight guide, for sewing machinesv The separating guides for the layers of work which are adapted to be assembled to a sewing machine have the function of separating the edges of the layers and to allow relative sliding of said edges in order to match them automatically. Without such guides it would not be possible to achieve relative sliding of the edges due to the excessive friction between the layers.
Said guides are essentially formed by two parallel and superimposed channels which define a C-shaped cross section extending parallel to the direction of movement of the work. With separating guides of known design, there is the disadvantage that when the layers of work to be assembled include thicknesses or increases in thickness due to the presence of pockets, etc., the layers can no longer slide along the two superimposed and parallel channels inasmuch as their sections are not sufficient to contain the fabric. In addition, it is not possible to provide guides with sections such as to allow the passage of said thickenings since they would lack the optimum conditions for guidance during sewing of layers of normal thickness. In anticipation of increases in thickness of the layer or layers to be assembled, said increases oridinarily due to the presence of pockets, belts, loops or the like, known technology provides that the guides be capable of being completely displaced from the work position. It is clear that this involves a significant loss of time on the part of the operator, who must continuously and manually adjust all of the guides separating the layers of work. Furthermore, there is the disadvantage that when the guide is displaced from its operating position in order to permit sewing layers with greater thickness, said layers (or more precisely, the edges of the layers to be sewed) no longer have any mechanical guides applied to them and the operator must therefore manually guide the layers to be assembled.
SUMMARY OF THE INVENTION The aim of the present invention is to eliminate totally the above-mentioned disadvantages and more pre cisely to transform with extreme simplicity a layerseparating guide into a straight guide. This purpose is achieved by a separating guide for layers of work which is convertible into a straight guide which is the object of the present invention. The guide is characterized by the fact that it includes a housing which is fixed and extends longitudinally perpendicular to the direction of movement of the layer of work. It includes one or more parallel and superimposed channels; one or more plate members located and slidable in said channels, means to extend them from the fixed housing, and means to move the plates within along said channels. The plates extending from the fixed housing define in combination with said fixed housing one or more parallel and superimposed C-shaped guides mounted parallel to the direction of movement of the layers of work, and with the plates retracted into the fixed housing define a straight vertical guide in combination with the fixed housing.
These and other characteristics are shown in greater detail in the description hereinbelow of a preferred but not exclusive embodiment illustrated by the appended sheet of drawings, wherein:
BRIEF DESCRIPTION OF THE DRAWING FIG. I shows in perspective the separating guide for the layers of work, applied to a conventional sewing machine;
FIG. 2 shows a perspective view of the guide converted to a straight guide;
FIG. 3 shows the guide in cross section along line III- III in FIG. 1;
FIG. 4 shows the guide in cross section along line lV-IV in FIG. 2.
DESCRIPTION OF PREFERRED EMBODIMENT Referring to FIGS. 1 and 2, the separating guide for the layers of work in question has been applied to a conventional sewing machine, whose frame consists of a base 1 on which is mounted a standard 2 supporting an arm 3 to whose end is applied a known head 4, said head carrying known upper sewing elements consisting ofa needle 5 as well as a conventional presserbar 6 for supporting a fabric-engaging presserfoot 7 of known type. The separating guide for the layers of work is mounted on the conventional work table 8 forward of head 4 and parallel to arm 3 of the sewing machine. The separating guide for the layers of work includes a fixed housing 9 which is essentially flat and extends lengthwise perpendicular to the direction of travel of the work. Fixed housing 9 contains three planar elements or stationary plates identified by numerals I0, II and 12 respectively, which are spaced and parallel and fixed to the upper surface of the work table 8 by means ofscrews I3. In channels 10a and 10b, formed between one stationary plate and another, are inserted slidable plate members 14 and 15 respectively. and more specifically, slidable plate 14 is inserted in the channel between plate 10 and plate 11 while slidable plate 15 is inserted in the channel between plate 11 and plate 12. The slidable plates 14 and 15 are provided with slots I6 and 17 respectively, through which screws 13 extend that include guide rings 18 of anti-friction material assembled thereon which are disposed in correspondence (FIGS. 3 and 4) with said slots I6 and 17. Slots ]6 and 17 allow sliding of plates I4 and 15 in the channels between one plate and another so as to allow them to extend from the zone of the stationary plates and to form with the same, two parallel and superimposed guides 19 and 20, the configuration of which defines the letter C (FIG. 3). When, on the other hand, the slidable plates are located within the stationary plates, they form a straight vertical guide with said plates which is coplanar and has a guide member 21 attached to plate I0 (FIG. 4). Slidable plate 14 is perfectly flat and has a rounded corner into which the layers of work are introduced, and which corresponds to similar corners provided on the stationary plates 10 and 11. Slidable plate 15 has an edge which emerges from the fixed housing and turns upwardly so as to facilitate the entry of the layers of work into the guides I9 and 20. Slidable plates I5 and 16 are both attached by means of screws 22 to an angle bracket 23 which is supported on piston 24 of a pneumatic cylinder 25 mounted on an integrally formed and upwardly directed bracket 26 of plate 10. Plate 10 has two parallel slots 27 in which slide the heads of screws 22. Pneumatic cylinder 25 is double-acting and is provided with two hoses 28 and 29 (FIG. 1) coming from a conventional air compressor, not shown. On the compressed-air line which feeds cylinder 25, there is a solenoid valve controlled by a start-stop button 30 which is carried by a support bracket 31 attached to head 4 of the sewing machine (FIGS. 1 and 2). The following is a description of the operation of the separating guide for the layers of work, which is convertible into a straight guide as described above. Under conditions in which two layers of work of normal thickness are to be assembled, the two slidable plates 14 and 15 protrude from the edge of the fixed plates so as to form the two essentially C-shaped. parallel, and superimposed guides 19 and 20.1n the course of the sewing of the two layers, when the operator encounters a thickening of the fabric, due for example to the presence of a pocket, she presses the start-stop button 30 which activates the solenoid valve incorporated in the line-powering cylinder 25, whose rod shifts the slidable plates 14 and 15 between the stationary plates 10 and 11 and 12 so as to form a single vertical straight guide in combination with guide member 21. After finishing sewing the layers with greater thickness, the operator releases button 30 and the cylinder returns the movable layers to their initial positions within the stationary plates. It is clear that the operator obtains a significant advantage with the guide described above in contrast to using other guides which must be continuously moved from their opera tional positions; in addition, even with movable plates that move between fixed layers, there is usually a vertical straight guide which significantly facilitates the operation of sewing. In the particular case described above, specific reference is made to a separating guide for two layers of work but it is clear that one could provide more than two slidable plates capable of being extended from a fixed housing so as to form more than two parallel and superimposed guides 19 and 20 and of using a pneumatic cylinder to shift the slidable plates, one could provide other electromechanical or mechanical means instead which could be controlled by means of a button. pedal, or toggle switch without thereby limiting the scope of protection of the'present patent.
I claim:
1. An apparatus for guiding a plurality of layers of fabric to be sewn together on a sewing machine work table, said apparatus comprising:
a. a housing secured to the machine work table which includes a plurality of planar elements superimposed in spaced relation with respect to each other to define guide channels therebetween;
b. a plurality of plate members slidably contained within the channels; and
0. means operatively connected to said plurality of plate members for moving the same within said housing between one position for forming separate guides for each layer of fabric and another position for forming a single straight line guide for all of the fabric layers.
2. The apparatus according to claim 1 wherein said planar elements define stationary plates disposed in a plane perpendicular to the direction of travel of the lay ers of fabric.
3. The apparatus according to claim 1 wherein said moving means includes a pneumatic cylinder having a piston interconnected with said plate members and a control means for selectively actuating said piston for sliding said plate members between their two positions.
4. The apparatus according to claim 3 wherein said control means includes a manually operable start-stop button operatively connected to said pneumatic cylin-
Claims (4)
1. An apparatus for guiding a plurality of layers of fabric to be sewn together on a sewing machine work table, said apparatus comprising: a. a housing secured to the machine work table which includes a plurality of planar elements superimposed in spaced relation with respect to each other to define guide channels therebetween; b. a plurality of plate members slidably contained within the channels; and c. means operatively connected to said plurality of plate members for moving the same within said housing between one position for forming separate guides for each layer of fabric and another position for forming a single straight line guide for all of the fabric layers.
2. The apparatus according to claim 1 wherein said planar elements define stationary plates disposed in a plane perpendicular to the direction of travel of the layers of fabric.
3. The apparatus according to claim 1 wherein said moving means includes a pneumatic cylinder having a piston interconnected with said plate members and a control means for selectively actuating said piston for sliding said plate members between their two positions.
4. The apparatus according to claim 3 wherein said control means includes a manually operable start-stop button operatively connected to said pneumatic cylinder.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT24371/73A IT987777B (en) | 1973-05-22 | 1973-05-22 | SEPARATING GUIDE OF THE WORK LAYERS TRANSFORMABLE INTO RIGHT GUI FOR MACHINES FOR COOKING |
Publications (1)
Publication Number | Publication Date |
---|---|
US3875881A true US3875881A (en) | 1975-04-08 |
Family
ID=11213297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US454844A Expired - Lifetime US3875881A (en) | 1973-05-22 | 1974-03-26 | Separating guide of fabric layers transformable in a straight guide for sewing machines |
Country Status (6)
Country | Link |
---|---|
US (1) | US3875881A (en) |
JP (1) | JPS5041650A (en) |
DE (2) | DE2424643A1 (en) |
ES (1) | ES426496A1 (en) |
GB (1) | GB1452194A (en) |
IT (1) | IT987777B (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4075957A (en) * | 1975-07-21 | 1978-02-28 | Rockwell-Rimoldi S.P.A. | Workpiece guide for sewing machines |
US4114546A (en) * | 1977-04-30 | 1978-09-19 | Pfaff Industriemaschinen Gmbh | Sewing machine with a workpiece guide mechanism |
US4133279A (en) * | 1976-03-16 | 1979-01-09 | Siegfried Wajcmann | Sewing apparatus |
FR2441012A1 (en) * | 1977-11-08 | 1980-06-06 | Rockwell Rimoldi Spa | DEVICE FOR GUIDING THE WORK IN A SEWING MACHINE |
US4541351A (en) * | 1983-05-26 | 1985-09-17 | Takatori Machinery Mfg. Co., Ltd. | Method and apparatus for automatic positioning of open ends of stockings for forming into pantyhose |
US4696243A (en) * | 1984-09-03 | 1987-09-29 | Antonino Romano | Pneumatic action accessory holder specifically for sewing machines |
US5313898A (en) * | 1991-07-11 | 1994-05-24 | Pegasus Sewing Machine Mfg. Co., Ltd. | Automatic sewing apparatus |
US5603271A (en) * | 1995-04-10 | 1997-02-18 | Findlay Industries, Inc. | Retractable seam gauge for sewing machine and pneumatic spacing adjustment |
EP1362944A1 (en) * | 2002-05-13 | 2003-11-19 | Pegasus Sewing Machine MFG. Co. Ltd. | Fabric guide device for a sewing machine |
CN102747547A (en) * | 2012-06-20 | 2012-10-24 | 吴江市隆泰喷织厂 | Sewing machine table with separation blade |
CN102747545A (en) * | 2012-06-20 | 2012-10-24 | 吴江市隆泰喷织厂 | Multifunctional sewing machine table |
WO2016160155A1 (en) * | 2015-03-31 | 2016-10-06 | Lear Corporation | Movable guide for a sewing machine |
CN106436060A (en) * | 2016-08-28 | 2017-02-22 | 浙江华盛服饰有限公司 | Sewing machine hemmer capable of adjusting length |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2554022C2 (en) * | 1975-12-02 | 1982-02-11 | Dürkoppwerke GmbH, 4800 Bielefeld | Workpiece guide |
IT1071306B (en) * | 1977-02-04 | 1985-04-02 | Rockwell Rimoldi Spa | SEWING UNIT FOR THE ASSEMBLY OF FABRIC CANVAS |
DE2728967C3 (en) * | 1977-06-28 | 1980-07-10 | Duerkoppwerke Gmbh, 4800 Bielefeld | Sewing machine for sewing edge-parallel seams in workpieces consisting of several layers of fabric |
IT1136330B (en) * | 1980-09-05 | 1986-08-27 | Saetti Paolo | FOLDING GUIDE FOR FABRIC, IN PARTICULAR TO REALIZE FINISHING TURNINGS IN KNITWEARS |
IT1231885B (en) * | 1987-10-09 | 1992-01-15 | Rockwell Rimoldi Spa | MULTI-PURPOSE SEWING MACHINE. |
IT1221791B (en) * | 1988-05-30 | 1990-07-12 | Rockwell Rimoldi Spa | CYLINDRICAL SEWING MACHINE |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3392691A (en) * | 1964-10-26 | 1968-07-16 | Pendleton Woolen Mills | Dart gauge |
US3786768A (en) * | 1971-10-20 | 1974-01-22 | Union Special Machine Co | Automatic hemming apparatus |
US3814039A (en) * | 1972-05-18 | 1974-06-04 | Vestra Union Sa | Automatic guide device for sewing machine or machine for assembling two or more superposed elements |
-
1973
- 1973-05-22 IT IT24371/73A patent/IT987777B/en active
-
1974
- 1974-03-26 US US454844A patent/US3875881A/en not_active Expired - Lifetime
- 1974-05-16 GB GB2169674A patent/GB1452194A/en not_active Expired
- 1974-05-21 DE DE2424643A patent/DE2424643A1/en active Pending
- 1974-05-21 ES ES426496A patent/ES426496A1/en not_active Expired
- 1974-05-21 DE DE19747417678U patent/DE7417678U/en not_active Expired
- 1974-05-22 JP JP49056775A patent/JPS5041650A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3392691A (en) * | 1964-10-26 | 1968-07-16 | Pendleton Woolen Mills | Dart gauge |
US3786768A (en) * | 1971-10-20 | 1974-01-22 | Union Special Machine Co | Automatic hemming apparatus |
US3814039A (en) * | 1972-05-18 | 1974-06-04 | Vestra Union Sa | Automatic guide device for sewing machine or machine for assembling two or more superposed elements |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4075957A (en) * | 1975-07-21 | 1978-02-28 | Rockwell-Rimoldi S.P.A. | Workpiece guide for sewing machines |
US4133279A (en) * | 1976-03-16 | 1979-01-09 | Siegfried Wajcmann | Sewing apparatus |
US4114546A (en) * | 1977-04-30 | 1978-09-19 | Pfaff Industriemaschinen Gmbh | Sewing machine with a workpiece guide mechanism |
FR2441012A1 (en) * | 1977-11-08 | 1980-06-06 | Rockwell Rimoldi Spa | DEVICE FOR GUIDING THE WORK IN A SEWING MACHINE |
US4307676A (en) * | 1977-11-08 | 1981-12-29 | Rockwell-Rimoldi, S.P.A. | Multilayer workpiece guiding device for sewing machines |
US4541351A (en) * | 1983-05-26 | 1985-09-17 | Takatori Machinery Mfg. Co., Ltd. | Method and apparatus for automatic positioning of open ends of stockings for forming into pantyhose |
US4696243A (en) * | 1984-09-03 | 1987-09-29 | Antonino Romano | Pneumatic action accessory holder specifically for sewing machines |
US5313898A (en) * | 1991-07-11 | 1994-05-24 | Pegasus Sewing Machine Mfg. Co., Ltd. | Automatic sewing apparatus |
US5603271A (en) * | 1995-04-10 | 1997-02-18 | Findlay Industries, Inc. | Retractable seam gauge for sewing machine and pneumatic spacing adjustment |
EP1362944A1 (en) * | 2002-05-13 | 2003-11-19 | Pegasus Sewing Machine MFG. Co. Ltd. | Fabric guide device for a sewing machine |
CN102747547A (en) * | 2012-06-20 | 2012-10-24 | 吴江市隆泰喷织厂 | Sewing machine table with separation blade |
CN102747545A (en) * | 2012-06-20 | 2012-10-24 | 吴江市隆泰喷织厂 | Multifunctional sewing machine table |
WO2016160155A1 (en) * | 2015-03-31 | 2016-10-06 | Lear Corporation | Movable guide for a sewing machine |
US9777416B2 (en) | 2015-03-31 | 2017-10-03 | Lear Corporation | Movable guide for a sewing machine |
CN106436060A (en) * | 2016-08-28 | 2017-02-22 | 浙江华盛服饰有限公司 | Sewing machine hemmer capable of adjusting length |
Also Published As
Publication number | Publication date |
---|---|
GB1452194A (en) | 1976-10-13 |
ES426496A1 (en) | 1976-07-01 |
JPS5041650A (en) | 1975-04-16 |
DE2424643A1 (en) | 1974-12-12 |
DE7417678U (en) | 1979-04-12 |
IT987777B (en) | 1975-03-20 |
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