GB2027878A - Looms having provision for ventilation and removal of lint and fly - Google Patents

Abstract

A loom has provision for air conditioning, the main cross-member (1) of the loom frame having a hollow section and serving as an air duct for the supply and/or removal of air. Special ducts which are sometimes very difficult to install within a loom are therefore unnecessary. As indicated in solid arrows, air, lint and fly are extracted through the duct (1) while air is supplied through a duct (3). Alternatively, flow is in reverse or both ducts (1) and (3) serve as extraction ducts and air enters through gaps (35). The temperature and moisture content of supplied air may be adjusted. <IMAGE>

Description

SPECIFICATION Looms having provision for ventilation This invention relates to looms having provision for ventilation, by which is meant looms having means for changing the air in the vicinity of the loom either by air admission, for example by the admission of conditioned air, and/or by the extraction of air. In the looms described in Swiss Patent Specifications Nos. 490549 and 524702, special air ducts are provided in the top part of the loom or above the loom or in the bottom part of the loom or in the floor. The loom therefore becomes relatively complicated and expensive. It is not always a simple matter to install air ducts, particularly in the bottom part of a loom, since many other parts, particularly the drive, are in the way.

According to the present invention, a loom has at least one load-bearing part which extends parallel to the weft direction, has a hollow section and constitutes an air flow channel for the provision of ventilation. This enables one or more parts of the loom frame which must be provided anyway to be used as air ducts as well as for their normal functions.

Little or no special air ducting is required. The most suitable load-bearing member for use as an air duct is the main cross-member of the loom.

The invention may be carried into practice in various ways but one loom embodying the invention will now be described by way of example with reference to the accompanying drawing the single Figure of which is a simplified longitudinal section of the loom.

Warp threads 8 run from a warp beam 21 over a back rest 11 through a warp stop motion 1 3 comprising a number of detectors, extend through healds 9 for forming a shed 22 and to the fell 23 where a reed beats up the weft thread which has been picked along the line of pick 24. The cloth 25 continues over a breast beam 1 2 and other rolls to be taken up on a cloth beam 10.

The loomframe comprises a box section main cross-member 1 and an additional crossmember 26; the two cross-members 1, 26 extend parallel to the line of pick 24 and interconnect two side frames or cheeks 27 of the loom, only one side frame 27 being visible in the drawing. The main cross-member 1 is constructed as an extraction duct into which air is drawn through apertures 2 in the directions indicated by arrows 7.

Above the weaving plane 28 there is an air supply duct 3 to which two cover flaps 4 are secured by hinges 29, the flaps 4 pivoting in the directions indicated by arrows 31. A protective curtain 32 is provided at each of the warp end and cloth end of the loom.

In operation, conditioned air from the duct 3 is supplied in the direction indicated by arrows 6 so that lint and fly in the machine are conveyed downwardly. Some of the lint and fly carried along in the air flow slides down along deflectors 5 mounted on the cross-member 26 towards the combined main cross-member and air extraction duct 1 for extraction thereby (arrows 7).

In a modified arrangement, the main crossmember 1 constitutes an air supply duct, the air issuing from it as indicated by dotted-line arrows 7a and being extracted by way of the duct 3, which in this case is an extraction duct, in the direction indicated by arrows 6a.

In another modified arrangement, both the main cross-member 1 and the duct 3 constitute extraction ducts so that the air is extracted in the direction indicated by the arrows 7 and 6a. This may be particularly useful when the warp threads 8 and cloth 25 subdivide the space below the flaps 4-i.e., the interior of the loom into two substantially separate chambers 33, 34 as is the case where, for instance, warp density is considerable. In this event fly originating above the weaving plane 28 is extracted through the duct 3 and fly originating below the plane 28 is extracted through the main cross-member 1, thus ensuring that very little fly passes through the plane 28 and therefore through the warp threads 8 and cloth 25. In this arrangement, where there is no supply of conditioned air, air is drawn in from the surroundings, e.g. by way of gaps 35.

When air is supplied and extracted, it is preferable to extract more air than is supplied so that there is a continuous flow of air inwards through the gaps 35 from the surroundings and through the loom to the corresponding extraction duct.

Preferably, the supplied air is conditioned -i.e., it is brought to a temperature and moisture content suitable for the yarn being processed. The conditioned air then has a special effect on the yarn when it flows up or down transversely of the plane 28 and passes through the warp threads 8 and the cloth 25.

In another arrangement, the duct 3 and the flaps 4 are omitted and the loom is open at the top. Air is then drawn into the combined main cross-member and extraction duct 1 as indicated by the arrows 7. Fly is removed so that the weaving shed environment stays clean. If air conditioning is required in this case, a complete conditioning plant for the weaving shed must be provided.

However, such a loom devoid of top parts 3, 4 can alternatively be arranged so that air enters, in the directions indicated by arrows 7a, through the combined main cross-member and feed duct 1 so as to issue into the surroundings. With this arrangement each individual machine can be conditioned individually by the entering air and it is unnecessary to provide overall conditioning for the weaving shed.

In a possible modification, a partition 38 shown in dotted lines subdivides the crossmember 1 into two parts 1 a, 1 b Duct 1 a can then be used, for example, for the supply of air (bottom apertures 2, bottom arrows 7a) and duct 1 b for the extraction of air (top apertures 2, top arrows 7a).

The cross-section of the cross-member 1 need not necessarily be of the hollow box kind and can be some other totally enclosed hollow cross-section such as a circular or oval crosssection.

The flaps 4 and the curtains 32 help to reduce noise.

It will be understood that the main crossmember 1 will be connected to an air delivery or air extraction fan or to the delivery of an air-conditioning unit depending upon the particular arrangement.

Claims (8)

1. A loom having at least one load-bearing part which extends parallel to the weft direction, has a hollow section and constitutes an air flow channel for the provision of ventilation.

2. A loom as claimed in Claim 1 in which the load-bearing part is formed with air flow apertures.

3. A loom as claimed in Claim 1 or Claim 2 in which the load-bearing part is the main cross-member of the loom.

4. A loom as claimed in Claim 1 or Claim 2 or Claim 3 in which the load-bearing part constitutes an extraction duct.

5. A loom as claimed in Claim 2 in which the load-bearing part constitutes an extraction duct and the loom includes guides for guiding fly to the air flow apertures.

6. A loom as claimed in any of the preceding claims in which the load-bearing part is connected to a fan.

7. A loom as claimed in Claim 1 or Claim 2 or Claim 3 in which the load-bearing part is connected to the delivery of an air-conditioning unit.

8. A loom substantially as described herein with reference to the accompanying drawing.