US1219633A

US1219633A - Welt-wetting device for sewing-machines.

Info

Publication number: US1219633A
Application number: US2555015A
Authority: US
Inventors: Charles T Farrell
Original assignee: United Shoe Machinery Co AB
Current assignee: USM Ltd; United Shoe Machinery Co AB
Priority date: 1915-05-03
Filing date: 1915-05-03
Publication date: 1917-03-20
Anticipated expiration: 1934-03-20

Description

c. T. FARRELL WELT WETTING DEVICE FOR SEWING MACHINES.

APPLICATION FILED MAY 3, I915. V

Pafen ted Mar. 20,1917.

the Welt in the manner UTED STATES CHARLES T. FARRELL, OF STOUGHTON,

MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

WELT-WETTING DEVICE FOR SEWING-MACHINES.

Patented Mar. 20, 1917..

Application filed May 3, 1915. Serial No. 25,550.

To all whom it may conoerm.

Be it known that 1, (Juanmcs FARRELL, a citizen of the United States, residing at Stoughton, in the county of Norfolk and State of ltlassachusetts, have invented certain new and useful Improvements in lVeltlVetting Devices for Sewing-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved welt wetting device for a welt sewing machine.

In the manufacture of welt shoes it is customary toimoisten and temper the welt to get it into proper condition to be attached to the shoe. The usual method of moistening and tempering the welt prior to the sewing operation is to dip a roll of the welt into a vessel of water and let it stand to allow the moisture to thoroughly penetrate into all parts of the welt. When a welt which has been moistened in this manner is placed on a shoe having a light colored upper, the upper will be stained and otherwise damaged wherever the welt comes in contact with the upper. Further, when a watersoaked welt is placed on a shoe and the welt allowed to dry out it will shrink and curl and become hard so that it cannot be readily tempered again and caused to lie smooth and flat when attached to the outsole. Also different kinds of welt, depending upon the kind of leather and method used in curing and tanning the leather, require different quantities of moistening liquid to secure the proper tempering for each individual welt. .lVlodern shoe manufacturing also has shown that with certain classes of welt the less the welt can be moistened in order to be properly tempered, the better will be the character of the welt and the more perfectly 'can it be attached in the shoe.

The primary object of the present invention is to provide an improved welt wetting device for a welt sewing machine to moisten the Welt, as it passes to the sewing point, in such a manner that it will overcome iectionable features incident to moistening heretofore practised.

With this object in view a feature of the present invention contemplates the provision in a welt sewing machine of a Welt wetthe ob ting device which will apply a moistening liquid to less than the entire surface of the welt during the passage of the welt from a source of supply to the sewing point. By arranging the welt wetting device so that it moistens less than the entire surface of the welt a portion of the surface can be left in an unmoistened condition and this surface can be that surface of the welt which is liable to come incontaot with the shoe upper during the sewing operation; To avoid moistening that part of the welt which might come in contact with and stain the shoe upper, the preferred embodiment of this feature of the invention contemplates applying moistening liquid to the flesh side only of the welt. In the best form of the invention which has yet been devised the moistening of the flesh side only of the welt is secured by delivering a moistening liquid into the groove of the welt.

Another feature of the present invention contemplates the provision in a welt sewing machine of means for moistening the welt during its passage from the source of supply to the sewing point, and means for varying or adjusting the amount of moistening liquid applied to the welt. The provision of means by which the amount of moistening liquid applied to the welt may be varied permits the moistening, to the desired extent, of different qualities of welting without danger of saturating the welting to an undesirable degree. This feature of the in-v vention has been embodied in a construction of welt wetting device which applies moisture to less than the entire surface of the welt. It is to be understood, however, that this feature of the invention is not limited I to any particular form of Welt wetting device, but is broad enough to include any welt wetting device which moistens the whole or any part of the surface of a welt so long as means are provided whereby the amount of moistening liquid applied to the welt may he varied.

The present invention also contemplates the provision in awelt sewing machine, of means for moistening the welt, and means whereby the moistening of the welt may be discontinued while the machine is stopped. By the provision of means for preventing the welt from being moistened While the machine is stopped, over-saturation of a portion of a welt is prevented and the welt throughout its length comes to the sewing point in the proper tempered condition. In the preferred 'form of this feature of the invention mechanism is provided which ope-ates automatically to throw the moistening means out of operation upon stopping the machine, and to throw the moistening means into operation upon starting the machine.

In applying the present invention to a welt sewing machine a welt wetting device of improved construction and mode of operation has been produced and this welt wetting device although particularly applicable for use in sewing machines, also embodies certain novel features of construction which are not limited to use in any particular kind of Inachine. These novel features of construction will be hereinafter described and claimed and will be obvious to those skilled in the art from the following description.

The several features of the present invention will be clearly understood from an inspection of the accom mnying drawings, in which Figure lis a front elevation of a welt sewing machine embodying my improved welt wetting device; Fig. 2 is a side elevation of the improved welt wetting device; and Fig. 3 is a vertical section of the welt wetting device taken on the line 3-3, Fig. 2.

1n the drawings the invention is illus trated as embodied in a welt and turn sewing machine such as that shown and described in the patent to Eppler, X0. 1,108,560, dated August 25, 1914. This machine is provided with the curved, hook needle 10, the looper l2, thread finger 14, channel guide 16, feed point or awl 18, feed slide 20, and welt guide These devices are operated through suitable connections by cams carried on the main cam shaft 24 of the machine. As is usual in this type of machines, the cam shaft makes one revolution for each cycle of operations performed by the stitch forming and work feeding devices.

During the sewing operation the welt 26 is led up from a roll or hank over a welt measuring guide roll 28 of a welt measuring device and passes forward to the sow ing point where the work feeding devices intermittentlv feed it forward during the sewing operzition. The welt measuring device herein illustrated is substantially' the same as the welt measuring device snown and described in the patent to Topham, No. 1,092,326, dated June 9, 1914, to which reference is made for a detailed description of the construction and operation of said device. The roll 28 is mounted on a measuring shaft 30 which is provided with a head or flange 31. On the head 31 is mounted a bell crank 32 which carries a measuring gripping jaw 34-. \Vhcn the cam shaft 24 is stopped at the end of the sewing operation, the stopping mechanism actuates an arm 36 of a spring 58.

(Fig. 1) which presses against the point 38 on a plunger 40, mounted in the measuring shaft, and this plunger in turn oscillates the bell crank 32 to clamp the welt between the guide 28 and the jaw 34:. With the welt so clamped a forward pull on the welt in removing the shoe from the machine will rotate the measuring shaft 30 and this shaft will limit and determine the amount of welt drawn forward in removing the shoe as clearly described in Patent No. 1,099,326 above referred to. This also throws the welt severing device 42 into operation. Upon starting the machine for the stitching operation on the next shoe the arm 36 is withdrawn to release the gripper 34 from the welt and allow the welt to pass freely over the guide 28 to the sewingpoint.

The welt wetting device illustrated in the dra\\'ings consists of a nozzle which is mounted on the guide roll of the welt measuring device and arranged to project into and apply moisture to the groove of the welt as the welt is fed over the guide roll. The moisteniug nozzle it is mounted in a barrel to which. is held above the face of the guide roll 28 and connected to the head 31 ot the measuring shaft by means of a flange 4-8. The nozzle is positioned in the barrel so that it will project into the groove of the welt as it is fed overthe guide roll 28. Moistening liquid is conducted to the nozzle through the barrel. by means of a flexible tube 50 which may be connected with a source of liquid supply consisting either of a fluid pressure main or a tank supported on the machine frame. The tube 50 is connected with the barrel 46 by means of a nipple secured in the end of the barrel. The flow of moistening liquid to the nozzle is controlled by means of a valve 54 which is normally hel against a valve seat 56 in the barrel by means The valve 51 has a stem 30 which projects through a packing gland 132 in the head of the barrel and the stem contacts with an operating lever (34.

The valve operating lever is controlled by the welt measuring device and acts to shut oil the supply of moisteuing liquid to the nozzle when the machine is stopped and to open the supply when the machine is in op eration. During the sewing operation the welt is slowly ted over the welt guide, so that a continuous stream of moisture is applied in the groovebut when the sewing operation is completed the welt remains stationary onl ever.- The face of the operating lever contacting with the valve stem is eccentrncally to clamp the jaw mounted to the fulcrum pin shank so that when the bell crank 32 is'oscillated to withdraw the clamping jaw 34, from the welt the operating lever (it will act to push the valve 54 away from the valve seat and allow the moistening liquid'to flow through the nozzle 52. The reverse motion of the bell crank 32 on the guide roll 28 at the completion of the sewing operation acts to relieve the'pressure of the operating lever on the valve stem to close the valve and shut off the liquidsupply. 64 may be adjusted to ditferent positions by means of the screw US to vary the extent of opening of the valve 54 to admit ditl'erent quantities of moistening liquid to the nozzle. By this means the amount of liquid delivered to the \vclt may be varied for dif-' ferent qualities. of welting so that any particular quality may gettlie necessary amount of moistening liquid to have it in proper temper for the sewing operation; ln order to adjust the nozzle A- t'or various thicknesses ol' welt the flange 4S provided with a slot by which the nozzle may be adjusted toward and from the face of the guide roll 28.

\Vith applicants wetting device the moisture can he conlined to the specific area which needs to he tempered in order to prepare it for some subsequent operation at the same time employing a minimum amount of water. In the moistcner illustrated the groove for receiving the seam will he in a tempered condition while the main body portion ofthe welting will not he adectcd or moistencd,and thus avoid any staining of the upper or other undesirable features which follow from wetting the welt over its entire surface.

Having thus scope of my invention cally dcscribed a machine indicated the nature and and having spec fiemhodylng the preferred form thereof, what I claim as 1. A welt shoe sewing machine, having, in -mnhination. feeding mechanism. and means for moistening the flesh side only of the welt during its The operating lever stitch forming devices, work passage from a source of supply to thesew l: ing point.

:2. A welt shoe sewing machine, having ih combination, stitch forming devices, work feeding mechanism, and means for deliver-- ing a moistening liquid into the groove of the welt during its passage from a source of supply to the sewing point. I

3. A welt shoe sewing machine, having, in combination, stitch forming devices, work feeding mechanism,-and means for applying moistening liquid toless than the entire surface of the welt during its passage from a source of supply to the sewing point.

t. A welt shoe sewing machine. having, in combination. stitch feeding mechanism. means for moistening a detinite width of welt during its passage from a source of supply to -the sewing point, and means for varying the amount of moistening liquid applied to the welt.

5. A welt shoe sewing machine, having. in combination. stitch forming and shoe feeding nicclmnism, a welt measurcr for determining the amount of welt drawn forward in the removal of the shoe. and a moistcning device controlled by the operation of the welt measurcr for delivering moisture to the welt.

6. welt shoe sewing machine, having, in combination. stitch forming and shoe feeding mechanism. a guide for the \velting, a moistcning device for conducting moistening liquid to one side only of the welting as it passes over the guide. and means for supplyiugliquid to the said device.

7. The combination of a guide for the welting. a 'nozzle arranged to project into the grooveof the welting. and means for supplying moistcning liquid to the nozzle.

- S. The combination of a guiding'1nccha nism for the welting. means for moistening a definite width of welting, and means for controlling the amount of liquid placed on the weltin 9. The combination of a guide for the welting. a moistening device having a'nozzle mounted on said guide. andnmans for adjusting the nozzle relatively to tl guide to provide for ditlcrent thicknesses li f forming devices, work I wettin