Textiles: weaving – Warp manipulation – Shedding
Patent
1997-07-18
1998-11-24
Falik, Andy
Textiles: weaving
Warp manipulation
Shedding
139 29, 36447002, D03C 322, D03C 1300, D03D 2900
Patent
active
058394826
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a device for use in a loom for raising warp threads in accordance with a desired weave pattern by means of weighted lifting rods.
BACKGROUND OF THE INVENTION
Industrial looms have undergone rapid development, from the introduction of punched card control to today's machines, which, in step with the general trend within electronics and computer technique, have evolved into fully electronic, computer-controlled machines. The state of the art of today's computer design systems makes it possible inter alia to control data media for electronic Jacquard machines as well as to control a large number of electronic Jacquard machines via a network computer, and also makes it possible, of course, to develop and process Jacquard designs as desired.
SUMMARY OF THE INVENTION
It is an objective of the present invention to make possible the use of computer technique in a simple and inexpensive manner also for manual or hand looms. The term "manual looms" is used to mean looms of the type found in homes, the type used by interested amateurs and also by craftspersons, i.e., looms which on the whole are intended for the production of individual items. Looms of this kind have a relative simple structure, and the pre-setting of the loom for desired raising (shedding) of the warp threads in accordance with a desired weave pattern, is relatively time-consuming, although today there are suitable punched card systems, and systems based on computer technique, so that the weaver can produce virtually all possible designs in the weave--designs which can be drawn according to need on a PC screen.
The easiest way to implement the invention is to use a cylinder/piston module with single top valves, controlled by respective superjacent solenoids. The module is realised most easily as a cylinder block of an appropriate material, where a desired number of parallel cylinders are drilled out, in which a respective piston with attached lifting rod is placed. A common chamber is provided above this cylinder block where the solenoids are located, above their respective valves. This common chamber can be put under negative pressure or positive pressure. Atmospheric pressure acts on the underside of the respective pistons and actuates these in an upward direction. When a piston ascends it will take a warp thread with it. Which valves are to be opened is determined by the design drawn on the PC screen, via printed card control which activates the appropriate solenoids. As soon as the weft is finished, the pistons are caused to descend into the starting position. Thus, the cycle continues.
Several modules can be arranged one after the other, laterally or in the longitudinal direction of the loom, thereby covering a larger area, with the possibility of weaving everything from narrow bands to wide woven cloths, up to the maximum width of the loom.
The new device is simple, inexpensive and can be adapted readily to an ordinary simple loom.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail with reference to the drawings, wherein:
FIG. 2 is a simplified outline of a loom where the invention is used;
FIG. 3 is a simplified section through a module; and
FIGS. 4 and 5 show enlarged sections through a preferred solenoid valve, in an open and closed position, respectively.
DETAILED DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates the principle of a computerized loom device where the invention can be used. A design control, a weave control and a lifting system are all to be found in the figure.
The design control is in reality a PC, while the weave control comprises a printed card control and a necessary pump for the provision of negative and positive pressure. The lifting system comprises a cylinder block. In practice, the cylinder block and the valve block will be constructed as one, as can be seen in FIG. 3. In addition, reference is made to the explanatory text in FIG. 1.
In FIG. 1 a cylinder block 1 is shown. The broken lines indicate how additional similar bloc
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patent: 3224465 (1965-12-01), Fontaine
patent: 4195671 (1980-04-01), Bossut
patent: 5390709 (1995-02-01), Martonffy
patent: 5494080 (1996-02-01), Sano
patent: 5762112 (1998-06-01), Feer
Muren Petter
Tronrud Ole Christian
Vestby Vibeke
Digital Weaving Norway AS
Falik Andy
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