Textiles: cloth finishing – Singeing
Patent
1985-05-29
1987-02-10
Mackey, Robert R.
Textiles: cloth finishing
Singeing
431158, D06C 902
Patent
active
046414037
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a machine for flame processing of textile fabric webs, especially a singeing machine with a burner unit comprising a combustion chamber terminating in a singeing slit, said chamber being connected with a gas mixing chamber via a gas feed slot, said slot being partially closeable by means of a damping device to adjust the flame width.
In machines of this type, textile fabric webs are carried past a singeing flame at high speed whereby this same machine is used to process fabric webs of very different widths. The maximum acceptable fabric web width depends on the width of the machine, which is usually several meters. Without suitable devices, a large portion of the singeing flame would burn uselessly during the processing of narrow fabric webs, i.e. high energy costs not required for the flame processing process would result.
A machine is known from German Pat. No. 20 23 782 in which the mixture feed slot to the conbustion chamber can be closed off by a row of strip shaped sealing elements in segments. The device described in that patent can achieve considerable energy savings; however when the sealing element is divided into segments it must generally be taken into account that a portion of the gas will continue to burn uselessly outside the width of the fabric web. In addition, adjustment of the flame width to a new fabric web is labor-intensive, for which reason there is a danger that the operating personnel, for reasons of convenience, will fail to adjust the singeing flame width.
The goal of the invention is to provide a machine wherein the width of the working flame can be adjusted continuously and with low operating expense.
This goal is achieved according to the invention by virtue of the fact that the damping device comprises one or two sealing strips insertable from one or both ends of the burner unit for the mixture feed slot. The important advantage of the end-wise insertion of sealing strips consists in the continuous adjustability of the flame width, so that a precise adjustment to the particular width of web being transported past the flame is possible. The pushing of sealing strips in and out from the ends of the burner unit is clearly simpler than, for example, operating a row of levers, as would be required with a discontinuous adjusting device.
As a result of the invention, the sealing strips can be guided in an expansion channel provided in the side walls of the mixture feed slot. To install a continuous damping device, therefore, a slight change in an already existing component is required without additional fastening devices or the like inside the burner unit being required. The invention can thus be achieved in a simple and cost-effective manner.
According to a preferred embodiment of the invention, the sealing strips can be flexible and wound by their outward end segments respectively upon rotatable winding bodies for adjusting the inward ends of the sealing strips, from which point the sealing strips are guided through guide tubes to the ends of the burner unit. When flexible sealing strips are used, in contrast to rigid rods or the like, the normal width of the machine can be retained. The guide tubes between the winding bodies and the ends of the burner unit can be guided in the same fashion as, for example, cooling tubes or pipes for the gas supply, so that the overall result is an extremely space-saving design. The continuous adjustment of the flame width can be accomplished by using a simple rotary motion.
According to another feature of the invention, the sealing strips can be made gas-permeable to an extent which is sufficient for feeding an igniting flame. This gas permeability of the sealing strips, which can be implemented by holes, slots, or the like, gives the operating personnel the opportunity to ignite the singeing flame from the ends of the burner unit safely even when the flame width is considerably reduced. The resultant gas losses remain extremely low and are insignificant cost-wise.
As a result of the invention
REFERENCES:
patent: 602813 (1898-04-01), Binder
patent: 2972299 (1961-02-01), De Marchi
patent: 3448498 (1969-06-01), Sando et al.
Melliand Textilberichte, issue 11, Nov. 9, 1982, (Heidelberg, DE), "Problematik des Sengens von Textilen Flachengebilden aus Polyester und Polyester-Mischungen", pp. 794 to 797.
Gessner Anton
Hohenester Otmar
Osthoff Walter
Mackey Robert R.
Osthoff Senge GmbH & Co. KG
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