FABRIC USED IN TROUSERS AND TROUSER LEGS TO SERVE AS SAW GUARD INSERTS

Abstract: A fabric intended to serve as an insert in working trousers or trouser legs for power-saw operators. The fabric consists of two layers, viz. a carrier layer or passive layer, wherein the threads (1) interconnect the threads (2) of the active layer, i.e. the layer, wherein on account of the contraction of the passive layer threads (1) caused by suitable treatment of them, the threads (2) of the active layer are forced to take on a sinuous configuration whereby at their contact with the saw chain the sinuous sections will be caught by the chain, and the threads of the active layer (2) be pulled out and thus so heavily oppose the movement of the saw chain that the latter is immobilized.

Description: <Desc/Clms Page number 1> FABRIC USED IN TROUSERS AND TROUSER LEGS TO SERVE AS SAW '-,GUARD INSERTS The invention concerns a fabric which is intended to be used as a trouser and trouser leg insert to serve as a protection against power-driven chain saws. The use of power-driven chain saws in mechanised forestry work contributes considerably to the increased risks for damages to the'user. Should he loose control of the saw and in consequence thereof the guide bar hit his leg - which is very common - very severe damages may be caused. Various-suggestions therefore have been presented, involving the application of specially designed inserts in @ the trousers or the trouser legs as a protection against damages of this nature. Although the protective items available up till now have increased the security con- siderably much remains to be done before the protection that is accessible to the saw-operator may be regarded as offering satisfactory,safety. The purpose of the present invention is to provide the saw-operator with such. improved protection by pre- venting or reducing the injuries. The purpose is to arrest the saw chain before, the latter has had time to hurt the saw-operator's legs. This is achieved in the manner appearing from the characterising clause of claim 1. Further characteristics of the invention will appear from the appended claims. The invention will be described in closer detail in the following with reference to the accompanying drawings, wherein the three drawing figures illustrate three different embodiments of fabrics designed in accordance with the teachings of the subject invention to give the < . effect desired. In the fabric illustrated in FIG. 1 the thin-diameter threads 1 form a passive layer and the larger-diameter threads 2 an active layer, or, expressed in a different <Desc/Clms Page number 2> way, the passive thread layer supports the active thread layer and.does not take part in arresting the saw chain. .The threads forming the active layer extend in a tortuous or serpentine pattern 3 which in reality are positioned on top of the weave and consequently they will instantaneously be caught by the saw chain upon their contact with the latter and be pulled out, said threads having a sufficient length in relation to the length of the insert to ensure that they will not break. However, their bond to the threads 1 in the passive layer is sufficiently strong to ensure that when the trousers are used or washed they will remain in position. Obviously, this embodiment may be modified in a variety of different ways. The essential consideration is that the passive layer be formed by threads that maintain the threads of the active layer in position when the garment is used and, above all, when it is washed, and that the active-layer threads have such a length that they will take on a tortuous pattern or that as a result of texturizing they are imparted the desired length, allowing them to be captured by the saw chain upon their contact with the latter and that they are sufficiently strong to cause the binder yarn in the passive layer to break and thereby arrest the saw chain. FIG. 2 illustrates another type of fabric, wherein the coarse yarns 4 form a tortuous or serpentine pattern 5. Like in the embodiment illustrated in FIG. 1 a passive layer of binder threads 6 are formed also in accordance with the embodiment of FIG. 2 but in the latter case threads 7 which are shrinkable for instance when exposed to a heat treatment are bound into the weave. By heatshrinking the threads 7 the yarns 4 which consist of a non-shrinking material will take on a tortuous pattern 5 having the¯same function as the tortuous pattern 3 of the threads in accordance with the embodiment of FIG. 1. <Desc/Clms Page number 3> The embodiment of FIG. 3 is similar to that of FIG. 2 in as much as it comprises threads 7 of a shrinkable material. Also this embodiment comprises a'passive layer formed by threads 6, shown as thin threads in the drawing figures and serving as binder threads. In addition, the embodiment in accordance with FIG. 3 comprises threads 8 of a non-shrinkable material, 'similar or identical to that of threads 4, so that also the threads 8 will take on a tortuous or serpentine configuration 9 the tortuous portions of which may be caught by the saw chain upon contact with the latter. The fabric or weave in accordance with the invention should be applied in several layers, preferably 3-12, on the internal face of working trousers or trouser legs. Practical tests have given unexpectedly good result and in cases where injuries have been inflicted, they have been less serious and consequently have healed in about a third of the time necessary before the use of protective inserts of the kind described in the aforegoing was initiated. The embodiments as illustrated and described are to be regarded only as practical examples and a variety of modifications are possible within the scope of the appended claims. For instance, instead of a shrinkable thread elastic threads may be used in order to make the thread or threads in the active layer take on a tortuous shape.

Claims: CLAIMS . 1. An insert for work-clothes, particularly for trousers and trouser legs, to serve as protection against injuries that may be caused by the saw chain of a power saw, c h a r a c t e r i z e d in that the fabric of which the insert is made up, consists of two layers, viz. one passive layer the threads of which interconnect the threads of the active layer, i.e. the layer wherein the threads, upon their contact with the saw chain, are arranged to be engaged by the saw-chain teeth, said engagement being made possible in that the active layer comprises threads which the passive layer threads force to take on a sinuous configuration. 2. An insert as claimed in claim 1, c h a r a c t e r i z e d in that the threads (2) of the active layer are made to take on a sinuous configuration as a result of the binding pattern of the threads of the passive layer. 3. An insert as claimed in claim 1, c h a r a c t e r i z e d in that the threads (4) of the active layer are made to take on a sinuous configuration (5) as a result of a heat-treatment induced shrinkage of the threads (7) incorporated in the passive layer. 4. An insert as claimed in claim 1, c h a r a c t e r i z e d in that the threads (4) of the active layer are made to take on a sinuous configuration as a result of the inclusion in the passive layer of elastic threads.

Inventors: ENG KJELL, ENG, KJELL
Applicants: ENG TEX AB, ENG-TEX AB
Application year: 1990
Main classification: A41D13
IPC codes: A41D31, D04B21