US2065286A

US2065286A - Ribbon loom

Info

Publication number: US2065286A
Application number: US706389A
Authority: US
Inventors: Nicolet Walter
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-01-15
Filing date: 1934-01-12
Publication date: 1936-12-22
Anticipated expiration: 1953-12-22

Description

Dec. 22, 1936. NI OL -f 2,065,286

RIBBON LOOM Filed Jan. 12, 1934 3 Sheets-Shet 1 I 771/677 for.

Dec. 22, 1936.

RIBBON LOOM Filed Jan. 12, 1934 w. NICOLET 2,065,286

3 Sheets-Sheet 2 Dec 22, 1936.

W. NlCOLET RIBBON LOOM Filed Jan. 12, 1934 Fig. 4

3 Sheets-Sheet 3 [DVQN for i atentecl bee. 22, 1938 UNITED srArss earner oFFieE Application January 12, 1934, Serial No. 706,389 In Germany January 15, 1933 13 Claims.

This invention relates to a ribbon loom. Bandages of the kind extensively used in nursing and for technical purposes do not come from the loom in the form in which they are sold and consumed, but have to be cut out of much longer and wider pieces of fabric which, for this purpose, must be re-rolled and then separated. This rerolling of the web delivered by the loom requires much time, exposes the fabric to the risk of being soiled and, as the web has to be out up, involves considerable waste which cannot be used any more.

The ribbon loom forming the object of this invention simplifies and cheapens the production of bandages. The new feature of the loom according to the invention is that, below the sand roller, a web winding device formed by two coaxial and oppositely movable slotted mandrels and a cutting device for separating the wound up web after a certain length are provided. When withdrawn, the mandrels release the roll formed thereon and, during the return motion, engage again and wind up the web. The cutting device is preferably disposed under the winding mandrels and separates the roll from the web only after the roll has been stripped off from the mandrels and dropped into a catcher underneath the cutting device. Above and below the winding mandrels a pair of jaws is disposed for keeping the web tensioned when the slotted winding mandrels are moved toward one another for catching the web in their slots, the winding mandrels as well as the cutting device being controlled by a measuring disc driven by the sand roller shaft. The parts of the device 1 may be constructed in a great variety of ways. By way of example, one form of the winding and cutting device is illustrated in the accompanying drawings, in which Figure 1 is a side view of the device; Fig. 2, a front view thereof; Fig. 3, a top view of part of the device; Fig. 4, a top view of the entire device; and Figs. 5 and 6 are detail views.

Of the entire loom the drawing shows merely the sand roller l, as all other loom parts can be dispensed with and are not needed to understand the invention. The fabric 2 drawn from the sand roller l is wound up by two oppositely disposed coaxial mandrels 3 which are slotted to insert the first part of the goods in the slot. The two winding mandrels 3 are axially movable to withdraw them from the fabric roll formed by them. When the winding mandrels are withdrawn, the fabric roll drops down into a funnel formed by an elastic wall and a rake 5, an.

elastic wall 6 disposed approximately on a level with the winding mandrels 3 preventing the dropping fabric roll I from running out. Prior to the dropping of the roll l, the fabric is caught closely above the roll by the tongs 8 and held 5 for some time. The portion of the fabric moved by the sand roller 1 while the fabric is being held up is drawn out to form a loop by an oscillating shaft ll disposed on an arm l0 rotatably arranged at 9. As the fabric is held by the tongs 10 8 when the winding mandrels 3 are withdrawn from the roll l, the latter has to unwind somewhat when dropping down, and the unwound portion of the roll 7 will be placed in front of a slot of a box l2 disposed in the machine 15 frame parallel to the mandrels 3 and containing a knife i2; projecting with its edge from the slot and being movable in the longitudinal direction of the box i2. While moving, the knife l3 separates the web. To facilitate cutting the 20 web is firmly pressed against the wall of the box l2 during the cutting motion of the knife It by a U-shaped jaw it. After separation of the roll I from the web 2 the rake 5 is swung about its point of suspension l5 so as to cause 25 the roll l to be dropped out of the funnel formed by the wall i and the rake 5 into a catcher. During the cutting motion the winding mandrels 3 move again towards one another and, as their axis is located exactly on the line determined by 30 the tongs 8 and the front side of the box l2, engage the web 2 tensioned between the tongs 3 and the jaw Hi. As soon as the jaw M is lifted from the box l2, the tongs 8 will begin to open and the winding mandrels will start turning 35 again. The process described is then repeated. Separation of the roll i from the web is always effected at a time when a certain length of the web has been wound up, the length being measured by a disc It (not shown in Fig. l) driven 40 by means of a worm gear ll from the shaft l8 of the sand roller 1 (see Fig. 2).

The winding mandrels 3 displaceably disposed in the frame portion l9 project relatively far beyond the portion l9, even if their ends 45 nearly touch one another. Part of these projecting ends 3 is toothed, and the toothed portions are engaged by the toothed wheels 26 carried by the shaft H. The shaft 2i carries also a rope pulley 22 which is pressed against one of 50 the toothed wheels 20 by the spring 23. The side of the pulley 22 hugging the one wheel 20 is covered with the leather 24 so as to frictionally drive during rotation the toothed wheel 25 and thus the shaft 2i The pulley 22 is driven 55 from the shaft [8 of the sand roller i in such a way that the shaft 21 rotates faster than the shaft 18. This arrangement serves the purpose of rapidly eliminating the loop formed in the web 2 by the roller H while the tongs 8 are in action when the winding mandrels 3 begin to turn again. When with the increase in the diameter of the fabric roll the circumferential speed thereof is greater than that of the sand roller I, sliding will take place relative to the pulley 22 and the toothed wheel 20, as the sand roller I does not yield as much fabric as the winding mandrels 3 can handle. The axial displacement of the winding mandrels 3 is effected by means of two bell cranks 25, one arm of which engages with a roll an annular groove in each winding mandrel 3, the other arms of the bell cranks extending towards one another and being forked at their ends. These forked ends of the bell cranks 25 rotatably disposed at 28 embrace jointly a roll 21 positioned at one end of a bell crank 29 loosely arranged on a shaft 28, the other end of the bell crank 29 hugging with a roll 30 the circumference of an eccentric disc 3|. This disc 3| is firmly secured to a shaft 32, and each rotation of the disc 3! causes the bell cranks 25 to deflect once in such a way that the winding mandrels 3 are drawn apart and after a time brought together again. When the winding mandrels 3 are drawn apart, the fabric roll formed by them is released as stated but cannot be drawn apart owing to its position in the frame portion I9. In order to bring the Winding mandrels 3 during their return motion always in a position insuring engagement of the web 2 by them between the frame portions 59 after the fall of the roll 1, the edges of the annular groove provided in the mandrels 3 do not extend parallel to one another but face each other like two wedges, so that each annular groove alternately extends like a funnel and then becomes narrower again. During displacement of the winding mandrels 3 by the bell cranks 25 the roll 25a carried by the cranks tends, owing to the wedge-effect, to engage the broadest part of the annular groove and thus, in a positive manner, effects the desired adjustment of the winding mandrels. Temporary interruption of the drive of the winding mandrels takes place by the withdrawal of the shaft 2i and the toothed wheels 20 carried thereby from the winding mandrels 3 to such an extent that the toothed wheels 20 are out of engagement with the toothed portion 3' of the mandrels 3. For this purpose the shaft 2| is arranged in the carriages 33 guided on the frame portions [9. By the draw bars 34 the carriages 33 are each connected with one arm of a bell crank 35 on the shaft 28, the other arm moving with a roll on the circumference of an eccentric disc 36 disposed on the shaft 32 of the eccentric 3!. The eccentric shaft 32 carries additional eccentric discs for operating the other members of the device. Two eccentric discs 31 serve for controlling the jaw l4 pressing the web 2 against the box i2, the jaw being carried by two levers 38 rotatably disposed at 39. The free end of the levers is connected by a bar 40 with a bell crank 46, one arm of which engages one each of the eccentric discs 31. The eccentric disc 42 serves for actuating the knife [3 disposed on a carriage movable in the box l2 and engaged at its front and rear ends by the end of a cord 43 wound around a drum 44 carrying a toothed wheel 45 which is in mesh with a toothed sector 46 hugging the eccentric disc 42 with the arm 46a. By means of the rods 48 the eccentric disc 41 operates the rotatable jaw of the tongs 8, and the eccentric disc 49 controls the rake 5 by the rods 59.

The eccentric shaft 32 does not rotate continually, but is coupled only from time to time with a rope pulley 5| which is driven from the main driving shaft 6! of the machine by the belt 52 and an interposed retarding gear. For connecting the eccentric shaft 32 with the driving pulley 5i a clutch coupling is provided whose part 5211 rests firmly on the shaft 32 while its part 5222 is firmly connected with the pulley 5i loosely arranged on the eccentric shaft 32. The drive of the eccentric shaft 32 is engaged and disengaged by the measuring disc I6 which, for this purpose, possesses at its circumference a clearance 53. The circumference of the disc 16 is hugged by one end of a two armed lever 54% rotatably disposed at the end of an oscillatory lever 53 rotatably arranged at 55. From the lever 56 and a further parallel lever 56a isposed on the same shaft proceed two rods 51 which engage opposite points of a ring 58 having noses for engaging an annular groove in the hub of the pulley 5|. The pulley 5! is, as a rule, drawn away from the coupling member 52a by the spring 59, but if during rotation of the measuring disc 56 the end of the lever 54 sliding thereon drops into the clearance 53, the

side of the clearance 53, during further rotation of the disc 15, will press the lever 54 towards the eccentric shaft 32 whereby the claw coupling will be engaged. Furthermore, the free end of the lever 54; will be placed in the path of motion of a finger 60 disposed on the eccentric shaft 32. When the eccentric shaft 32 has completed a rotation, the finger 69 presses against the free end of the lever 54 and thus lifts the other end of this lever out of the clearance 53 of the meas uring disc I6. Under the action of the spring 59 the oscillatory lever 56, with all the parts controlled by it, then moves back to initial position whereby the coupling of the eccentric shaft 32 and the drive is abolished again.

The fundamental idea of the invention can find expression of course in many other ways, e. g. instead of a knife moved over the web a cutting device cooperating with a fixed knife and moved vertically to the web for cutting may be used, which preferably cuts like scissors. The winding and cutting device can be used for single and multiple looms. In the latter case, separate winding mandrels must of course be provided for each web, while the other parts of the mechanism may be coupled.

I claim:-

1. In a ribbon loom provided with a sand roller shaft, a web winding and a web cutting device and means for operating said devices in timed relation toone another, said means comprising an eccentric shaft, a plurality of eccentric discs carried by said shaft, a rope pulley loosely carried by said shaft and driven at reduced speed from the main drive of the machine, clutch members adapted to couple said pulley with said eccentric shaft, a measuring disc having a clearance in its circumference, said disc measuring the length of web to be cut by said cutting device, a worm gear for rotating said disc from the sand roller shaft, an oscillating lever, rods connecting said oscillating lever with said pulley, a two-armed lever rotatably disposed at the end of said oscillating lever, one arm of said two-armed lever sliding on the circumference of said measuring disc provided with a clearance and dropping into said clearance at a predetermined time to displace the two-armed lever during further rotation of said measuring disc, a spring controlling said oscillating lever, said oscillating lever being deflected against the action of said spring by said two-armed lever and displacing by said rods said pulley to bring said clutch members into engagement, said shaft carrying said pulley being driven by said pulley, a finger disposed on said eccentric shaft and engaging the free end of said two-armed lever after one rotation of said eccentric shaft to lift the other end out of the clearance of said measuring disc, said rods being then drawn back into initial position by said spring to uncouple said pulley and eccentric shaft.

2. In a ribbon loom the combinaition with the sand roller which draws up and continuously feeds the fabric, of two co-axial slotted mandrels movable axially in opposite directions and driven periodically from the shaft of the sand roller at a higher speed than the latter; a friction coupling interposed in the drive between the shaft of the sand roller and said mandrels; an oscillating shaft co-operating with the sand roller and said mandrels for forming a loop in the fabric between the sand roller and said mandrels; a cutting device for severing the fabric web after a predetermined length of the fabric has been wound up; means for moving said mandrels towards and away from one another, for coupling said mandrels with and uncoupling them from the shaft of the sand roller and for actuating said cutting device; and a measuring disc continuously rotated at a reduced speed by the shaft of the sand roller and controlling said last named means.

3. In a ribbon loomthe combination with the sand roller which draws up and continuously feeds the fabric, of a Web winding device consisting of two co -axial slotted mandrels movable axially in opposite directions, arranged under the sand roller and driven periodically from the shaft of the sand roller at a higher speed than the latter; a friction coupling interposed in the drive between the shaft of the sand roller and said mandrels; an oscillating shaft co-operating with the sand roller and said mandrels for forming a loop in the fabric between the sand roller and said mandrels; a cutting device for severing the fabric web after a predetermined length of the fabric has been wound off, said cutting device being arranged below said web winding device; means for moving said mandrels towards and away from one another, for coupling said mandrels with and uncoupling them from the shaft of the sand roller and for actu-- ating said cutting device; a measuring disc continuously rotated at a reduced speed by the shaft of the sand roller and controlling said last named means; and a funnel having a movable wall disposed under said cutting device, the

rolllformed by said mandrels dropping into said funnel partly unwound when said mandrels are moving apart.

4. In a ribbon loom the combination as specified in claim 3, in further combination with tongs arranged above said web winding device and extending over the entire web, said tongs being adapted to hold the web during withdrawal of said mandrels from the roll formed by them.

5. In a ribbon loom the combination as specifled in claim 3, in further combination with tongs arranged above said web winding device and extending over the entire web, said tongs being adapted to hold the web during withdrawal of said mandrels'from the roll formed by them, the said cutting device operating in the space between two cross bars of the machine frame, whose front faces lie in a common vertical plane extending through the axis of said mandrels, said faces being hugged by the web on the dropping 10 of the roll from said mandrels on the withdrawal of the latter.

6. In a ribbon loom the combination as specifled in claim 3, in further combination with tongs arranged above said web winding device and ex- 15 tending over the entire web, said tongs being adapted to hold the web during withdrawal of said mandrels from the roll formed by them, and a U-shaped jaw arranged on swinging arms and adapted to be pressed against the cross bars 20 adjoining the cutting device shortly before operation of said cutting device to hold also the web and keep it tensioned up to the tongs.

'7. In a ribbon loom, a combination as specified in claim 2, wherein the cutting device com- 25 prises a knife, a box in which said knife is arranged, a carriage longitudinally displaceable in said box and carrying said knife, a rope engaging with both ends the front and rear ends of said carriage, a rope pulley carrying the rope and a 30 toothed wheel, a toothed sector, and an eccentric disc for moving said sector to and fro to bring it into engagement with said toothed wheel.

8. In a ribbon loom, a combination as specified in claim 2, wherein said mandrels are 35 toothed at their averted ends, in further combination with a plurality of toothed wheels in mesh with said toothed ends, and a common shaft carrying said toothed wheels, said shaft being driven from the shaft of the said roller at 40 reduced speed by means of a friction coupling.

9. In a ribbon loom, a combination as specified in claim 2, wherein said mandrels are toothed at their averted ends, in further combination with a plurality of toothed wheels in mesh with 45 said toothed ends; a common longitudinally displaceable shaft arranged on the loom walls and carrying said toothed wheels; and eccentric discs for controlling said shaft to bring said toothed wheels out of engagement with the toothed ends 50 K of said mandrels.

forks; a bell crank lever embraced by said forks; and an eccentric disc controlling the other arm of said last named bell crank lever.

11. In a ribbon loom, a combination as specified in claim 2, wherein the means for moving the mandrels towards and away from one another comprise bell crank levers engaging with one arm provided with a roll grooves of said 5 mandrels, the edges of said grooves being shaped like wedges facing one another with their points.

12. In a ribbon loom, a combination as specified in claim 3, wherein the means for operating said web winding and said cutting device com- 70 prise a shaft, a plurality of eccentric discs carried by said shaft, a rope pulley carried by said shaft and driven at reduced speed from the ma chine shaft, and clutches adapted to couple said pulley with said shaft.

13. In a ribbon loom, a combination as specified in claim 3, wherein the means for operating said web winding and said cutting device comprise a shaft, a plurality of eccentric discs carried by said shaft, a rope pulley carried by said shaft and driven at reduced speed from the machine shaft, and clutches adapted to couple said pulley with said shaft; said clutches being actuated by said measuring disc which is formed as a cam disc.

WALTER NICOLET.