CS240950B1 - Apparatus for checking the weft yarn dosing in a multi-shed weaving machine - Google Patents

Abstract

The invention relates to the control and sensing of the yarn tension drop in the work process during the production of fabrics. It is a device for controlling the weft thread dosage in the area of the winding point on the feeder bobbin. The essence of the invention is a tension drop sensor on a weaving machine located immediately at the weft thread winding point into the feeder, equipped with guiding elements and an aperture in the working field of the sensor. The sensor rests on the controlled weft by its own weight and, when the weft tension is reduced, performs a swinging or sliding movement from the working to the fault position, in which the sensor aperture is set against the sensor. The sensor receives an electrical signal from the blocking device. Adjusting the sensor aperture against the sensor stops the machine. The invention can be used in all textile machines, for which one of the basic requirements is the control of the reduced yarn tension with subsequent stopping of the machine.

Description

The invention relates to a method for decorating the parchment of a parchment on a clearing after leaching, leaching, machining, decalcification and pickling, after which the filling of the flaxseed filling containing further esterified rendered fat, glycerin, denatured alcohol and water is quenched into the clearing.

Parchment is a specially treated animal skin, mostly made of calf, goat and lamb. It used to be used as a pad for writing and for technical purposes, especially for bookbinding. This so-called binding parchment was previously decorated and treated with an artistic color finish except for book binding. The finish remained attached mainly to the cheek surface and, due to repeated rubbing and exposure to light and moisture, soon lost its original appearance.

The above-mentioned deficiency removes the method of decorating the parchment of the parchment on a clearing after leaching, leaching, machining, decalcification and pickling, after which the filling of the flaxseed filling containing further esterified rendered fat, glycerin, denatured alcohol and water, according to the invention consists in bringing the wedge to a tensioned state after being filled with the decoction and then applying it at selected points to a locally defined sliding pressure, for example by moving the wooden spatula over the face of the wedge depending on the chosen decorative pattern, whereupon the wort is dried.

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The technical effect of the process according to the invention results from the fact that it is used to prepare parchment particularly suitable for art book binding, which has not been produced so far, so that it is an enrichment of the binding parchment pellet. The decorative pattern, which after drying is stable against abrasion, light and water, can be prepared in the selected form already during the manufacture of the parchment and then the tanning finish of the already decorated parchment can be continued.

In essence, the process according to the invention is carried out predominantly on calf, which after pouring, leaching, machining, decalcification and pickling is quenched in a tanning drum with a filling decoction, which contains flaxseed decoction, esterified rendered fat, glycerin, denatured alcohol and water. After stretching the parchment onto the wooden frames, a colored leather pigment is pushed out with a wooden spatula onto the desired decorative pattern. After drying, the face treatment is resistant to abrasion, light and water, because the colored pigment is extruded from the face. Suitable is rendering material up to 4 kg, with brown or black hair.

Closer illumination is provided by the following example.

An example of calf pieces is soaked and sieved, then peeled off, leached in a lime solution and re-saponified. The weighed clearing thus prepared weighs 60 kg. Subsequently, the ground is decalcified and pickled in a solution of pancreatic enzyme to a pH of 8. This is followed by placing the ground in a tannery barrel containing 420 g of formaldehyde. In this barrel, the clearing spins for 2 and a half hours, during which time all formaldehyde is removed from the bath.

After tanning, the ground is thrown out of the goat barrel; Allow to stand for 16 hours, then wash, wring and fill with bleach containing denatured alcohol, float chalk, glycerin, esterified rendering oil and water, and a solution of overcooked linseed. The total amount of bleaching composition is 26.5% by weight, based on the squeezed weight of the starting material. Filling is carried out in a tanner drum for 1 hour.

Then the filled parchment is stretched onto the wooden frames, the colored leather pigment is pushed out with a wooden spatula onto a decorative varnish.

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The decorated parchment is left on the frames until it is dried. After drying, the individual pieces of parchment are trimmed, ground from the side of a tannery grinder, brushed and ironed at 50 ° C at 20 kPa.

Claims (1)

SUBJECT OF THE INVENTION A method of decorating a parchment face on a clearing after leaching, leaching, machining, decalcification and pickling, after which the filling of the linseed filling containing further esterified rendered fat, glycerin, denatured alcohol and water is flushed into the clearing, after being filled with the decoction, it is tensioned and then applied at selected locations by locally limited sliding pressure, for example by moving the wooden spatula over the face of the clearing depending on the selected decorative pattern, whereupon the clearing is dried.