US1860528A - Embroidery thread cutting machine - Google Patents

Description

May 31, 1932. F. BUESSER 1,860,523 EMBROIDERY THREAD CUTTING MACHINE Filed Aug. 27. 1950 wumtoz 3351 abliQf/na Patented May 31, 1932 rnnnnnrcx BUESSER,;OF'GUTTENB1EHRG, NEW JERSEY EMBROIDERY THREAD Corrine mncnmii Application filed August 27, 1930. Serial No. 478,021.

This invention relates to embroidery thread cutting machines, and has'for its primary object and purpose to provide a simply constructed machine which may be operated at high speed for cutting the threads extending between parts of the embroidery design superimposed on the fabric, without danger of cutting ormutilating the fabric in any way. i It is one ofthe particular objects of my invention to provide a machine of this character having spaced sets of rotary cutting knives, and a manually operable means engageable with the fabric to displace the same relative to the rotary knives upon the approachof a seam or an openin through the fabric to'the knives so that the fabric'will not be out by the rotating knives.

It is another object of the invention to provide an improved construction of the rotary knives, each having a plurality of spaced cutting edgesand a protecting shoe associated therewithfor the purpose of preventing the point ofthe knife from impaling the fabric and to pick up the embroiderythread from the surface of the fabric and direct the same to the cutting edge of'the knife. p lVith the above and other objects invi'ew, the invention consists in theimproved em broidery thread cutting machine, and in the form, construction and relative arrangement of its several parts as will be hereinaftermore fully described, illustrated in the accompanying drawings, and subsequently incorporated in the subjoined claims. V

In the drawings, wherein I have shown one simple and practical embodiment of the invention, and in "which similar reference characters designate corresponding parts throughout the several views,

Figure 1 is a vertical sectionalv view through the'machine; V V r Fig. 2 is a fragmentary plan view thereof; 2 Fig. 3 is ardetail elevation showing one form of the rotary thread cutter Fig.4 isja detail section taken onthe line HofFig d-and' Fig. 5 is a sectional view' taken on the line '55 of Fig. 3.

As illustrated inthegdrawin'gs, upon suit ableend frames such as that indicated at 5,

a roller 6 is mounted for rotation in support- I l ing bearings. The embroidered fabric indicated at F is drawn around this roll over suitable vertically spaced guides 7 mounted in the frame and upwardly over theten'sioning roller 7 From the tensioning' roller, the fabric extends longitudinally over the spaced supporting rollers 8 -to the roll 9 journalled in suitable bearings at the opposite side of the machine frame. The material extends upwardlyaround the roller 9 and is with,- drawn therefrom around the small roller 10 journalled at its ends in the pivotally sup ported link members 11. i Between the spaced guide rollers 8 and above the same, the spaced parallel'shafts 12 and 13 are journalled at their ends in suitable supporting bearings 14. Upon each of these shafts a plurality of closely arranged cutter members generally indicated at 15 are rigidly fixed in any suitable manner. Each of the cutter members is provided with a plurality of knife edges eccentrically disposed with relation vto the axis of the cutter shaft. As herein shown, each cutter member consists of a ring or annulus 16 having re cesses 17 in one of its side faces spacedapart '90" to receive oneend-of an angular blade means of the rivet indicated at 24. This shoe at the point of thecutting edge 21 preferably 0 is formed with a widened end portion 25 projecting beyond said point of the blade and having a rounded or convex inner surface as I shown at 26 leading to the sharpened cutting edge 21 inwardly of the point of the blade.

The cutter shafts are driven in the same direction through any suitable system of gearing, and as herein shown, I have illustrated the power shaft 26 connected at one 10!! of its ends by the drive belts 27 with suitable pulleys on one end of the shafts 12 and 13.

Between the shafts 12 and 13 and below the fabric F, a roller 28 is mounted between the ends of a frame 29 which is pivotally supported for rocking movement as at 30 upon the bearings 14 for the cutter shaft 12. The upper end vof a rod 31 is connected to this frame, the lower end of which is connected to a suitable foot treadle (not shown). The adjustable stop screw shown at 32 limits the rocking movement of the frame in one direction. Thus, when this frame 29 is in the position shown in Fig. 1 of the drawings, the roller 28 is pressed upwardlyagainst the under side of the fabric, thus holding the fabric between the supporting rollers 8 in proper position whereby .the embroidery threads may be picked up and cut by the rotary cutter members. v

U n the opposite ends of each of the sha v s 12 and 13 discs 33 and34 respectively are loosely mounted, the discs on each shaft being connected at their peripheries by a cross bar 35, 36 respectively. The spaced discs 33 and 34 in the corresponding ends of the cutter shafts are connected with each other by the link bar 37, said bar being pivoted at one of its ends to the disc 34 above theaxis ofshaft 13 and at its other end to the disc 33 below the axis of the shaft 12.

. To each of the bars and 36, downwardly extending rods 38, 39 respectively, are secured and areconnected with each other at their lower ends by a cross rod 40, 41 normally positioned above the fabric I. To the bar 36, an upwardly projecting handle member 42 is attached. I

, In the operation of the machine as above described, assuming that the fabric F and the two series of rotary cutter members are moving in the direction indicated by the arrows in Fig. 1 of the drawings, as the shoes 23 of each cutter member move downwardly upon the surface of the fabric, they engage under the thread, the ends 25 of said shoes guiding and directing the individual threads to the sharpened edges 21 of the cutter members whereby the threads are severed. This cutting action occurs without appreciable resist? ance to the continued uninterrupted movement of the fabric through the machine, while the ossibility of the penetration of the fabric by t e oints of the cutting edges of the blades is rec uded, thus obviating possible cutting orinjnry to the fabric in the high speed operation of the machine.

Such embroidered fabrics are produced in 3 various lengths, and the different lengths thereofare connected together. The seams thus produced, must not of course, be engaged by the rotary cutters. Also, in certain fabrics, as a part of the embroidery design, there are openings through the material. In such cases, in order to prevent the entrance of the knife blades into the openings and to avoid the connecting seam, the operator grasps the handle member 12 and moves the same downwardly as the section of the material having the seam or openings approaches the first set of rotary cutting knives on the shaft 13. The cross rod 41 is thus engaged with the upper side of the fabric and the latter is forced downwardly so that the shoes 23 of the cutting members cannot engage the threads. After the material has passed beyond the first set of cutting knives, the movement of the handle member 42 is reversed, and through the link connections 37 between discs 33 and 34, the other cross rod is then caused to exert a downward pressure upon the fabric so that it will not be engaged by the shoes or the cutting knives of the second set of cutters on the shaft 12. In this manner, all possibility of damage or injury to the embroidered fabric in its passage through the machine will be avoided.

From the foregoing description considered in connection with the accompanying drawings, the construction, manner of operation and several advantages of my present invention will be clearly and fully understood. It will be seen that I have provided a machine for cutting the threads of embroidered fabrics which is simple and durable in its construction, and may be operated at very high speed. I have above refered to a particular form of the rotary cutting members, though it will be understood that if desired, instead of making each of these members in the form of an annular ring with the separate cutter blades secured thereto, I may utilize cutters of various other mechanical construction. Thus, it is apparent that the individual cutter members might readily be produced from a single metal disc, stamped 0r cutout in the form shown in Fig. 3 to provide the spaced cutting edges. Also the protecting shoes carried by the cutter members and the means for their attachment might likewise be varied in many respects.

Accordingly, it is to be understood that in these and other particulars, I reserve the privilege of incorporating the essential features of my present disclosure in various other alternative structural forms as may be fairly considered within the spirit and scope of the appended claims.

I claim:

1. In a machine of the kind described, horizontally spaced groups of rotar thread cutters, means for supporting em roidered fabric for movement beneath the thread cutter-sand in a position whereby the individual embroidery thread will be engaged and cut, said means including a fabric supporting member between the groups of cutters, means for rotating said groups of thread cutters in the direction of movement of the fabric, and manually operable means associated with each group of thread cutters for displacing selected parts of the fabric radiallyfrom the rotary'cutters while the fabric remains in contact with, said supporting member.

2. In a machine of the kind described, horizontally spaced groups of rotary thread cutters, means for supporting embroidered fabric for movement beneaththe thread cutters and in a positionwhereby the individual embroiderythread will be engaged and cut, means for rotating said groups of thread cutters in the direction of movement of the fabric, a vertically movable member associated with each group of thread cutters, and manually operable means connected with said members for successively actuating the same upon approach of a selected part of the fabric to the respective groups of cutters for depressing, said part of the fabric and displacing the same radially from the respective groups of cutters. V

3. In a machine of the kind described, horidisplace a selected portionof the fabric out of thread engaging relation to the respective cutting devices, and a single manually operable means for selectively actuating said members to fabric displacing position.

6. In a machine of the kind described, horizontally spaced rotary thread cutters, means for supporting an embroidered fabric for movement below and in thread engaging relation to said cutting devices, a member movably associated with each cutting device operable to displace a selected portion of the fabric out of thread engaging relation to said device, and connecting means between said members operative to selectively actuate said members into and out of fabric displacing position with relation to the respective cutters. c 1

In testimony that I claim the foregoing as my invention, I have signed my namehereto. I

FRED. BUEssER.

zontally spaced groups of rotary thread I cutters, means for supporting embroidered fabric for 'movement beneath the thread cutters and in a position whereby the individual embroidery thread will be engaged and cut, means for rotating said groups of thread cutters in the direction of movement of the fabric, spaced discs loosely mounted 7 said devices will engage and sever the em-h on the axis of each groupiof thread cutters, a rod rigidly connected with said discs extending axially of the thread cutters above the fabric, an obliquely disposed link pivotally connected at its ends with the correspondingv discs on the spaced axes of the thread cutters, and; a manually operable member fixed to one of said bars whereby said connected discs may be rotated in rela- I tively opposite directions tosuccessively engage said rods upon the fabric and depress selected partsof the fabric upon approach to the respective groups of threadcutters radially therefrom.

4. In a machine of the kind described, a plurality of thread cutters horizontally spaced apart, means for supporting embroidered fabric for movement whereby the embroidery threads are engaged by said cutters, and manually operable elements associated with the respective cutters for displacing a selected portion of the moving fabric out of operative relation to one of said cutters, and said supporting means lIlClllding a fabric engaging member operative to maintain the fabric in threadengaging relation to the other cutter.

5. In a machine of the kind described, hori- Zontally spaced thread cutting devices,means for supporting embroidered fabric for movement relative to said cutting devices whereby broidery threads, a member associated with each of said cutting devices to engage and

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