US2010302A - Seam for paper maker's drier felt - Google Patents

Description

T. HINDLE ET AL SEAM FOR PAPER MAKERS DRIER FELT Aug. 6, 1935.

Filed April 25, 1934 2 Sheets-Sheet l 'lll/111111.11!)

Aug. 6, 1935.- T. HINDLE ET Ax. i

SEAM FOR PAPER MAKER S DRIER FELT Filed Aprill 25, 1954 2 Sheets-Sheet 2 Fig@ di H Fig 8 Dr d ig@ Figa@ Patented Aug. 6, 1935 www f Thomas. Hindle Sam Lord, Blackburn,

.. `In GreatBritain'May:11,1933:

Papermakers* drier feltsfconsisting of heavy Fig.4 is ai plan partlylinsection showing wovenv fabric' having from one to' four'or even jointed end of-feltiff Y i more plies, are* used in variouswidths up to aboutl Figs.' 5J andf-6` alre perspective view 'and plan 330. inches. The felts work around a bankA ofi partly i'nsectonshowingamodied'construction. steam heated drying cylindersand intermediatel Fig. 'lis af-perspectivevlew showing another 5 rollersvin avmanner analogous to the operation of 1 modificationfw i. e i 0f l an ordinary driving belt. Asthe' diiliculties'arev Figs. 8, 8a, andbv 'aref'various formsof "con-- veryfgreat in fittinga wide endless felt to the nectinglinks."l Pf h fi i .lpaper machine', it is4 4generally found more con- ,'iIn itssimplestfonrshownfin Flgsivlto 4 about venient to nt an open-ended felt, and then to four inches at each end a of the felt A is folded 10 join the ends together, a process known as seamover to the back of the felt and sewn down by ing the felt. It has been customary to seam or several rows of machine stitching thus forming a join such felts by sewing the ends together by loop about two inches wide along each end of hand, The seam made in this manner is notl the felt, the folded-over or back portions of the satisfactory as the large and irregular stitches loops are slit at intervals forming narrow slots B 15 pull out and break under tension, and often cause longitudinal of the felt spaced equidistantly along the felt to run intol longitudinal creases, due to the ends of the felt. Each slot B is about two the partially transverse pull of the stitches. The inches in length and terminates on the extreme time taken to sew the felt in this manner is contip of the fold i. e. 0n the felt end, in a Circular siderable, and it is also frequently necessary to 01" Substantially I'Ollnd hOle b- The Slots may be 20 re-make the seam several times during the usespaced apart One t0 tWO inches 0r more accordful life of a felt, and very often a. felt has to be ing t0 requirements.

discarded in consequence of its ends being un- The edges 0f the slOtS B in the felt A may be suitable for re-sewing although the remainder I'enfOleed and prevented IOIn ffayng by sewing of the felt is Capable of further service, around each slot and also by lines of sewing across 25 Driel' felt ends have been joined by a, lap seam the Width 0f the felt adjacent t0 the Slots. Alterriveted together. In such a, seam, `there is a natively, or additi0na11y,the edges of the slots B strong tendency for the rivets toy bend over in the may be treated With Varnish 0l gum. OI by any fabric, when they may damage the paper in Similar Ineens 0f Preventing fraying.

manufacture, The two ends of the felt A, prepared as above 30 The object of this application is to provide a. described, are brought together and mutually atnew and novel method of joining or seaming pataehed by links D, aDDIOXiIneely Of H-OImapermakers felts, and to provide a seam of very tion. These links may be made from any Inagreat mechanical strength which has no inherent terial having the requisite Strength, and may be tendency to cause the felt to crease, and which steel stampngs nshed by galVanZng, eleCIO- 35 permits the ends to be fastened together in a, plating or other treatment providing resistance Very expeditious manner with the felt in posito chemical action. Alternatively, the links D tion on the paper machine. conforming in outline with the general shape The invention comprisesaloop about two inches described, may be made from Wire, bent and wide formed along each end of the belt, the either brazed or welded together (see Fig. 8). 40 folded over or back portion thereof being cut 'I'he parallel legs d of the H-shaped links D with a number of narrow slots longitudinal of are slightly shorter in length than the spacing the felt and spaced equidistantly across it and between adjacent slots in the ends of the felt,

a number of links of approximately H formation and the length of the cross-bar dl connecting inserted in the respective slots by which the two the two parallel legs is approximately equal to 5 ends of the felt are mutually attached. two thicknesses of the felt.

The invention will be fully described with ref- In joining the two ends of the felt, one leg erence to the accompanying drawingsz d of a link D is inserted through a slot B in Fig. 1 is a perspective view of one form of the one end of the felt, and the other leg is inserted 5o invention. through the corresponding slot B in the other 50 Fig. 2 is a plan of one end of felt extended end and further links are similarly inserted until with slots cut therein. all the slots are occupied, and the two ends of Fig. 3 is a perspective view of one end of felt the felt closely linked together. The legs d of with loop formed thereon. Y the links D lie in the ends of the loops, and the Fig. 3a is a perspective view of a link D. cross-bars dl project through the slots from one end of the felt to those in the other end and serve to carry the tension applied to the seam and felt when running on the paper machine.

In the form shown in Figs. 5 to 7 the slotted loops al are made from separate pieces of fabric sewn or attached in any desirable manner to the ends of the felt A leaving the ends a2 to project beyond the loops suiciently to butt together (Fig. 5) or to overlap toa greater or less degree (Fig. '7). In this case,` the cross-bar dl of the H-shaped link D is longer, say equal to four or eight thicknesses of felt. The links D are inserted in the manner above described, Ifrom the back of the felt.

In any of the forms of this improved seam, the links are protected by the fabric forming the loops or by the felt proper from contact with the surfaces either of the drying cylinders or intermediate rollers of the paper machine, vthus preventing damage to the paper, the cylinders or rollers, or to the seam itself. As the links D are separate units, each joining a small width of felt, no transverse strains are imposed on the felt at the seam with the result that there is no inherent tendency for the felt to crease.

What we claim as our invention and desire to protect by Letters Patent is:-

1. A paper makers drier felt constructed with a. loop about two inches -wide at each end cut with a plurality of narrow slots disposed longitudinally of the felt and spaced equidistantly across it.

2. A paper makers drier felt constructed with a loop about two inches wide at each end cut with a plurality of narrow slots disposed longitudinally of the felt and spaced equidistantly across it and means by which the two ends of the felt are mutually attached. n

3. A paper makers drier felt formed with each end cut with a number of slots longitudinally of the felt, and with each end folded over to the back and sewn down by several rows of machine .stitching to form a loop about two inches wide along each end.

' 4. A paper makers drier felt as in claim 1 formed with a slotted loop at each end made from'separate pieces of felt stitched thereto and leavingl the ends of the felt to project beyond the loops either to butt together or overlap.

5. A paper makers drier felt constructed with a turned over loop about two inches wide at each end, a plurality of narrow slots cut therein longitudinally of the felt, a plurality of shaped linksv inserted in the respective slots projecting across from one loop to the other and joining together the two ends of the felt. Y

THOMAS I-IINDLE. SAM LORD.

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