US3918376A - Tucking apparatus for curtain or like cloth - Google Patents

Abstract

An apparatus for making a tucking curtain comprises a sewing machine with a presser foot, a slider slidably mounted on the base of the sewing machine and carrying a presser, a pair of upper and lower spatulas and a width setting bar located near under the arm head of the sewing machine. The curtain cloth is laid over the spatulas and the width setting bar, folded back around the bar and passed under the spatulas to form a loop and then sewed along its seam for the first run while held by the pressers. Then the upper spatula is raised apart from the lower to spread the looped cloth therebetween and simultaneously the tucking plate enters between the spaced spatulas to tuck in the looped cloth, whereupon the upper spatula is lowered and retracted together with the lower spatula and the width setting bar. The tucked-in edge is then sewed for the second run to complete the formation of a tuck in the cloth.

Description

11] 3,918,376 [451 Nov. 1 1 1975 4] TUCKINC APPARATUS on CURTAIN OR LIKE CLOTH Primat'y E.mnzi:zerGeorge H. Krizmanich Inventor's: Fukujiro'Nishiwaki, Maebashi- Tomii Yoshino, Higashikurume, both of Japan Attornev, Agent, or Firm- Posnack, Roberts & Cohen [57] ABSTRACT An apparatus for making a tucking curtain comprises a sewing machine with a presser foot, a slider slidably mounted on the base of the sewing machine and carrying a presser, a pair of upper and lower spatulas and a width setting bar located near under the arm head of the sewing machine. The curtain cloth is laid over the spatulas and the width setting bar, folded back around the bar and passed under the spatulas to form a loop and then sewed along its seam for the first run while held by the pressersi'Then the upper spatula is raised apart from the lower to spread the looped cloth therebetween and simultaneously the tucking plate enters between the spaced spatulas to tuck in the looped cloth. whereupon theupper spatula is lowered and retracted together with the lower spatula and the width setting bar. The tucked-in edge is then sewed for them w aw m 5 1/ l a 9 /57 J H n m Ame 4 m m m 5 a ll S D m t T. l ym m2 N L .H m llM E 0W 5 2 mm 0H 18 4 LP C. P m L% G & 4 u 2 u S W 0 H D "2 N w 0 l h 2 u W C m ,6 m a l m mA 0 1l .I. l T. a .I..,J u s m & wmTm d C M 4 A3 mmr n% m "w T m m e l .f. vn m w U d L F d 8 e D. c all 5 ".H/D. n m.m z an 0 nfl m 7Z 2 3 555 5 second run to complete the formation of a tuck in the cloth.

1 12/144 6 Claims, 21 Drawing Figures mmn amm 5 .mnfl n w o ma Doc Ala 6 90% 0099lll 2 86 Patent Nov. 11,1975 Sheet10f12 3,918,376

U.S.Paitent Nov. 11, 1975 Sheet2of 12 3,918,376

U.S.Patent N0v.11, 1975 Sheet30f12 3,918,376

US. Patent Nov. 11,1975 Sheet4 of 12 3,918,376

US. Patent Nov.11, 1975 Sheet5of12 3,918,376

US. Patent Nov. 11,1975 Sheet6of 12 3,918,376

US. Patent Nov. 11, 1975Sheet 7 of 12 3,918,376

U.S. Patent N0v.11, 1975 Sheet8ofl2 3,918,376

US. Patent Nov. 11, 1975 Sheet9of12 3,918,376

Sheet 10 of 12 3,918,376

U.S. Patent Nov. 11, 1975 US. Patent Nov. 11,1975Sheet 12 of 12 3,918,376

TUCKING APPARATUS FOR CURTAIN OR LIKE CLOTH FIELD OF INVENTION This invention relates to apparatus for forming tucks in curtains and the like regardless of the quality of the cloth which is involved in the tucking operation.

BACKGROUND Heretofore, a number of tuck-making devices designed as attachments for sewing machines have been proposed. For example, U.S. Pat. No. 930,469 discloses a simple attachment for producing open welt seams or garments. This attachment is used only for making single type tucks. Further, U.S. Pat. No. 488,547 discloses a device which is adapted to form tucks in cloth and to guide the same to the stitch forming mechanism of a sewing machine. Use of this device enables two tucks, which are formed so as to lie in the same direction, to be simultaneously made and guided to the stitch-forming mechanism of a two-needle sewing machine, so that two continuous seams may be formed in the tucks. Also, U.S. Pat. No. 2,043,735 discloses a tuck-making device whereby graduated or fancy tucks may be made with the same facility as straight tucks. These prior devices all require troublesome and time-consuming hand operation.

SUMMARY OF INVENTION An object of the invention is to provide an improved apparatus for making quickly and automatically double type of tucks in a curtain cloth or the like.

Another object of the invention is to provide an apparatus for making continuously and quickly a curtain with tucks having loops for fitting hanger hooks.

To achieve the above and other objects of the invention there is provided apparatus for tucking cloth with a sewing machine. This apparatus comprises a base, a slider arranged on said base for sliding movement in both the transverse and lengthwise directions with respect to the cloth to be tucked, a working plate fixedly secured to said slider to extend horizontally therefrom and having a working position for guiding and supporting the cloth and a first presser pivotably connected to said slider and extending transversely of the cloth for lifting and lowering movement over the working plate. A second presser is provided on the base positioned on the working plate adjacent the first presser and parallel relation thereto. An upper spatula and a lower spatula are mounted on the slider for lifting and lowering movement over the working plate for backward and forward movement relative to the working position of the working plate in the transverse direction of the cloth to be tucked. The lower and upper spatulas are arranged one above the other and in a position parallel to the first and second pressers and are movable up and down so as to be brought into and out of engagement with each other. A width setting bar is mounted on the slider for forward and backward movement relative to the working position of the working plate in the transverse direction. A tucking plate is pivotably connected to the slider so as to be inserted between the upper and lower spatulas when the spatulas are moved away from each other.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a perspective view of the whole apparatus in which the first presser, the second presser, the upper spatula and the lower spatula are position on the working plate,

FIGS. 2 through 5 and FIG. 19 are perspective views showing the operation of the parts which perform the tucking,

FIG. 6 is a plan view showing the upper spatula arm lever and the lower spatula arm lever,

FIG. 7 is a front view showing the relation between the first arm lever, the lower arm plate and support plate,

FIG. 8 is a side view of the same,

FIG. 9 is an end view taken through line AA in FIG. 6,

FIG. 10 is a perspective view of the mechanism for rotating the rotatable shaft,

FIG. 11 is a perspective of a slide mechanism for the width setting bar,

FIG. 12 is a perspective view of the mechanism for swinging the tucking plate,

FIG. 13 and FIG. 14 are front views showing the mechanism for actuating the slider,

FIG. 15 is a front view showing the relation of the slider and the base,

FIG. 16 is a side view of the same,

FIG. 17 is a view showing the sewing cam,

FIG. 18 is a circuit diagram,

FIG. 20 is a perspective view showing a cloth tucked and sewn, and

FIG. 21 is a perspective view of the mechanism for sliding the upper spatula and the lower spatula.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will next be described in detail with reference to an embodiment thereof shown in the accompanying drawings. Those parts which perform the formation of tucks include afirst presser 1, anupper spatula 2, alower spatula 3, awidth setting bar 4, atucking plate 5 andasecond presser 6.

Said first presser 1. is, fixed at 16 to one end of afirst arm lever 11 of which the other end is pivotally affixed at 15 to aslider 7. Positioned over one end portion of saidfirst arm lever 11 and fixed to theslider 7 is aframe 13 carrying a pus-hing shaft which is normally biased downward by means of aspring 10 so that aroller 14 pivotally attached to the lower end of theshaft 12 pushes downwardly the end portion of said first arm lever to bring the above-mentionedfirst presser 1 against the upper surface of a workingplate 7 connected to one end of theslider 7. (See FIGS. 1 and 2).

Referring to theupper spatula 2 andlower spatula 3, there is arotatable shaft 17 rotatably supported at itsmiddle 18 by the slider"7 and on one end of saidrotatable shaft 17 is loosely fitted one end of a lowerspatula arm plate 19 having at its other end aslot 21 through which extends amachine screw 22 for fastening thelower spatula 3 such that thelower spatula 3 is held parallel to saidfirst presser 1 and in contact with the working plate 7' of theslider 7 located under the arm of the sewing machine. The lateral position of thelower spatula 3 may be adjusted by means of saidslot 21. Adjacent to the lowerspatula arm plate 19 there is an upperspatula arm plate 23 fixed at its one end to therotatable shaft 17 as by 24 and having at its other end aslot 25 through which extends amachine screw 26 for fastening theupper spatula 2 to overlie thelower spatula 3. The lateral position of theupper spatula 3 may be adjusted by meansof saidslot 25. On one end of asupport shaft 27 rotatably carried by theslider 7 at its middle is asupport plate 28 fixed at one end thereof which has a hookedportion 29 at the other end engaged around theperipheral groove 19 of the cylindrical portion at the end of said lowerspatula arm plate 19 so that saidsupport plate 28 remains normally still without turning along with the swinging of the lowerspatula arm plate 19. Apin 30 extends from the center of thesupport plate 28 to engage the center of aspring 31 of which one end is fixed to thesupport plate 28 and the other end is fixed to the end of the upperspatula arm plate 23, whereby saidspring 31 is through its expanding action, normally urging said upperspatula arm plate 23 downward to position theupper spatula 2 on the lower spatula 3 (See FIG. 2).

Anangled hook 33 is secured to said lowerspatula arm plate 19 in a position such that under thehorizontal part 34 of saidhook 33 is located aprojection 35 extending from the previously mentioned first arm lever- 11. Aspring 36 is stretched between thehorizontal part 34 of thehook 33 and thesupport plate 28 so as to urge thelower spatula 3 onto the workingplate 7 of theslider 7.

There is asecond lever 38 pivotally supported at its center on thebase 8. One end of thesecond arm lever 38 is positioned under thefirst arm lever 11 and a tension spring 39 is mounted between the other end of thesecond arm lever 38 and thebase 8. A connectingrod 40 is provided between the end of thesecond arm lever 38 and a first solenoid (See FIGS. 2 and 7). Anarm 41 formed on the other end of afore-mentionedrotatable shaft 17 is adapted to be pushed by apush lever 42 swingably on avertical shaft 53 fixed on theslider 7.

One end of saidsecond push lever 42 is forced to engage with asecond cam 43 secured to acam shaft 54 by means of aspring 44 extending between thepush lever 42 and the slider 7 (See FIGS. Z and Thewidth setting bar 4 is slidably fixed at one end thereof to theslider 7 and it is held parallel to theupper spatula 2 andlower spatula 3 as well as is positioned on the right hand side of the workingplate 7 of theslider 7. A slidingshaft 45 slidably supported at its middle by theslider 7 has on one end thereof a fixingplate 46 with ahole 47 for slidably receiving abent portion 4 of thewidth setting bar 4 to be fastened to the fixingplate 46 by means of aset screw 48.

To the other end of said slidingshaft 45 is secured a connectingplate 49 pivotally connected at 51 to one end of alink 50, whose other end is pivotally connected at 55 to one end of afirst push lever 52 swingably mounted on saidvertical shaft 53. The other end of saidlever 52 is forced against a first cam 56 secured to saidcam shaft 54 by means of aspring 57 stretched between the lever and theslider 7. The lateral position of thewidth setting bar 4 may be adjusted by shifting thebent portion 4 along thehole 47 of the fixing plate 46 (See FIG. 1 1).

Thetucking plate 5 is swingably supported atthe center by theslider 7 and its one end is normally positioned outwardly of the width setting bar so that the tucking plate may come in between the upper andlower spatulas 2 and 3 when they are open apart, and the other end is connected pivotally to one'end of alink 61 whose other end is pivoted at 64 to one end of athird push lever 63 swingably mounted on said vertical anism for the slider comprises acam 66 of the sewing machine (LK cycle sewing machine), and a swingable arm 67 engaging saidcam 66 at one end as at 68 and connected pivotally as at 69 at the other end to theslider 7 by means of a link 67. The cross slide mechanism for the slider comprises amotor 76 set on thebase 8, agear 78 fixed on the shaft of the motor, adisc 79 attached to the side of thegear 78, agear 80 engaging thegear 78 and having apin 81, alimit switch 82 so positioned as to be tripped by saidpin 81, and arod 84 pivotally connected at 85 with aneccentric pin 83 projecting from saiddisc 79 and at 86 with the support shaft 75 (See FIGS. 13 and 14).

The second presser comprises the presser foot of said LK cycle sewing machine and is located between thefirst presser 1 and the upper andlower spatulas 2 and 3 (See FIG. 1).

On the other end of thesupport shaft 27 is fixed a connectingpate 88 to which is pivotally connected one end of alink 89 whose other'end is pivotally connected at 92 to one end of a forth push lever 91 swingably mounted on thevertical shaft 53. The push lever 91 is urged to engage at the other end acam 93 fixed on thecam shaft 54 by means of aspring 94 stretched between said lever 91 and the slider 7 (See FIG. 21).

The operation of the apparatus will now be described. Upon turning on the switch for a first solenoid, a second solenoid and the sewing machine driving motor, the first solenoid will be energized and pull the connectingrod 40 downward by its attractive force. Thesecond arm lever 38 will then swing on thepivot 37 and cause, with one end thereof, thefirst arm lever 11 to swing upward about thepivot 15 against the action of thespring 13. As a result, thefirst presser 1 will be elevated. When thefirst arm lever 11 swings upward as stated above, itsprojection 35 pushes theangled hook 33 upward against the tension of thespring 36 to cause the lowerspatula arm plate 19 to rotate the rotatable shaft 17 (as shown by the arrow). Thelower apatula 3 will then move upward and at the same time lift theupper spatula 2 against the action of thespring 31, followed by the upward swing of the upperspatula arm lever 23 whereby therotatable shaft 17 will be rotated and stop.

The second solenoid is energized simultaneously with the energization of the first solenoid thereby to elevate thesecond presser 6 which is constituted by the presser foot of the sewing machine (in a manner well known).

As a result, the first presser l, theupper spatula 2, thelower spatula 3 and the second presser '6 come and stop at elevated positions over the workingplate 7 of theslider 7. At that time, the sewing machine driving motor is of course rotating.

Then, as shown in FIG. 2, thecloth 70 is placed with one end portion thereof arranged over theupper spatula 2 and thewidth setting bar 4 while applying one longitudinal edge thereof to a ruler fixed to theslider 7. Thereafter, it is folded backward around the width setting bar and passed under thelower apatula 3 so that its leading end underlies the remaining portion of the cloth in a position under thefirst presser 1. Thecloth 70 is stretched from thewidth setting bar 4. It is needless to say that the lengthwise edge of thecloth 70 should be always held along theruler 71 during that process.

Then a first button is pressed to disenergizes said first solenoid. Thereupon the first solenoid will reverse and thesecond arm lever 38 will swing back due to the action of the spring to lower its left-hand end, so that thefirst arm lever 11 which has been lifted up by the end of thesecond arm lever 38 will be let down swinging about thepivot 15. Accordingly thefirst presser 1 will come down to hold thecloth 70 on the working plate 7' of theslider 7. When thefirst arm lever 11 comes down as mentioned above, theangled hook 33 of the lowerspatula arm lever 19 will not be pushed upward by theprojection 35 of thefirst arm lever 11 any longer and therefore the lowerspatula arm lever 19 will swing downward under the tension of the 'spring 36 about therotatable shaft 17 so as to bring thelower spatula 3 into contact with the underlying portion of thecloth 70. The above-mentioned downward movement of said lowerspatula arm lever 19 causes the upperspatula arm lever 23 also to move downward under the action of thespring 31 so that the upper spatula will overlie thelower spatula 3. Of course, therotatable shaft 17 rotates at that time (as shown by the arrow in FIG. 3).

Next a starting switch (not shown) is turned on, whereupon the second solenoid will be deenergized. The second solenoid will then reverse to lower thesecond presser 6, which has been elevated, to hold thecloth 70 on the working plate 7' of theslider 7. When the secnd solenoid is deenergized as stated above, a third solenoid is energized to make a clutch of the sewing machine on whereby the sewing machine starts its operation as it now receives power from said sewing machine driving motor and rotates the cam shaft. Thecam 66 rotates and this rotation is converted into the traverse movement of the operating arm 67 which causes theslider 7 to traverse as the sewing needle 72 is sewing. The proceeding of such operation is represented in the development chart of the cam shown in FIG. 17. Since the sewing machine is anLK cycle machine 8 in which one cycle comprises two runs of sewing, it stops because of the disconnection of a clutch after the first run of sewing has been completed. This stopping of the sewing machine is sensed by a limit switch which will operate a relay to energize the'second solenoid. Thereupon thesecond presser 6 is raised and stops, and this stop is electrically sensed to operate a relay (for this purpose refer to the circuit shown in FIG. 18) to drivemotor 75, whose rotation is transmitted to thegear 78 to rotate it in the direction of the arrow in FIG. 13, causing rotation of thearm lever 84 to shift theslider 7 to the left (See FIG. Each revolution of thegear 80 makes itspin 81 strike thelimit switch 82 to stop themotor 76, so that theslider 7 will stop at the leftmost position (See FIG. 14).

When thesecond presser 6 has completed its rising, it is sensed electically and this information is transferred to a relay to excite themotor 73 which will rotate thecam shaft 54 so that the first cam 56 will cause thewidth setting bar 4 to be retracted through thefirst push lever 52, thearm 50, the connectingplate 49, the

slidingshaft 45 and the connectingplate 46, while on the other hand thesecond cam 43 causes thesecond push lever 42 to push thearm 41 to rotate therotatable shaft 17 so that theupper spatula 2 will be lifted up to some distance from thelower spatula 3 and therefore thecloth 70 will be opened (See FIG. 19). At the same time thethird cam 65 causes thetucking plate 5 to be swung about the pivot through the action of thethird push lever 63 and thelink 61 so that the tucking plate will be brought between theupper spatula 2 and thelower spatula 3. In the mean time, thesecond cam 43 causes thearm 41 and theshaft 17 to reverse to let theupper spatula 2 down. Accordingly a tuck is formed on thecloth 70 by means of thefirst presser 1, theupper spatula 2 thelower spatula 3 and the tucking plate 5 (See FIG. 4).

After this, the third cam reverses the third push lever and thelink 61 to draw out the tucking plate from between theupper spatula 2 and thelower spatula 3. Thereafter theforth cam 93 causes the upper and thelower spatulas 2 and 3 to be retracted through the action of the forth push lever 91, thelink 89, theconnector plate 88 and the support plate 28 (See FIG. 5). Thereupon aprojection 95 formed on the cam shaft strikes thelimit switch 96 to stop themotor 73. The signal from thelimit switch 96 will excite a relay to deenergize the second solenoid and therefore thesecond presser 6 will come down. Then, as previously stated, the third solenoid is energized to make the clutch of the sewing machine make theslider 7 traverse as'sewing is performed. Thus, the second run of sewing with the LK cycle sewing machine comes to an end. Then the first solenoid and the second solenoid become deenergized and thefirst presser 1 and thesecond presser 6 are lifted.

The clutch is then disconnected. This disconnection of the clutch is sensed by a limit switch to excite a relay to start themotor 73 and themotor 76 to rotate thecam shaft 54, causing upper andlower spatulas 2 and the width setting bar to proceed forward to return to their initial positions. The operation of themotor 76 also causes the returning of theslider 7 rightward to its initial position. The cloth may now be taken out. A tuck has thus been formed in the cloth as shown in FIG.

What is claimed is:

1. An apparatus for tucking cloth with a sewing machine, said apparatus comprising a base, a slider arranged on said base for sliding movement in both the transverse and lengthwise directions with respect to the cloth to be tucked, a working plate fixedly secured to said slider to extend horizontally therefrom and having a working position for guiding and supporting the cloth, a first presser pivotably connected to said slider and extending transversely of the cloth for lifting and lowering movement over the working plate, a second presser on the base positioned on the working plate adjacent said first presser in parallel relation thereto, an upper spatula and a lower spatula mounted on the slider for lifting and lowering movement over the working plate and for backward and forward movement relative to the working position of the working plate in the transverse direction of the cloth to be tucked, said upper and lower spatulas being arranged one above the other in a position parallel to said first and second pressers and being movable up and down so as to be brought into and out of engagement with each other, a width setting bar mounted on the slider for backward and forward movement relative to the working position of the working plate in the transverse direction, and a tucking plate pivotably connected to the slider so as to be inserted between the upper and lower spatulas when the spatulas are moved away from each other.

2. An apparatus as set forth inclaim 1 comprising a first lever, a spring, upper and lower arm plates and further springs, first presser being pivotably connected to said slider through said first lever and being normally pressed against the working plate by means of the first said spring, said upper and lower spatulas being pivotably connected to the slider'through said upper and lower arm plates, said arm plates being juxtaposed with respect to each other and being I normally pressed against the working plate by means of said further springs, said upper and lower spatula arm plates being constituted so as to be lifted and lowered in connection with the lifting and lowering movement of said first lever.

3. An apparatus as set forth inclaim 2 comprising a solenoid and a second lever pivotably connected to the base substantially at right angles to said first lever, said second lever being positioned at one end below the first lever and connected at the other end to said solenoid, whereby the first presser can be moved upwardly and downwardly.

4. An apparatus as set forth inclaim 1 comprising a rotatable shaft, said lower spatula arm plate being loosely mounted on said rotatable shaft which is pivotably connected to the slider, said upper spatula arm plate being fixedly mounted on said rotatable shaft, whereby said upper and lower spatulas can be moved into and out of engagement with each other.

5. An apparatus as set forth inclaim 4 comprising a support plate arranged between said upper and lower spatula arm plates in a position parallel thereto, said support plate being engaged at its one end with a boss of the lower spatula arm plate on said rotatable shaft extending slidably from the slider in the transverse direction of the cloth to be tucked and being fixedly mounted at the other end on a support shaft extending slidably from the slider in parallel relation to said rotatable shaft, and said support plate being connected to the upper and lower spatula arm plates through said springs, whereby the upper and lower spatulas can be moved backward and forward relative to the working position of the working plate by moving the support shaft.

6. An apparatus as set forth inclaim 5, characterized in that said slider includes a plurality of cam means including a first cam means for operating the width setting bar, a second cam means for operating the width setting bar, a second cam means for operating the rotatable shaft, a third cam means for operating the tucking plate and a fourth cam means for moving said upper and lower spatulas backward and forward relative to the working position of the working plate.

Claims (6)

1. An apparatus for tucking cloth with a sewing machine, said apparatus comprising a base, a slider arranged on said base for sliding movement in both the transverse and lengthwise directions with respect to the cloth to be tucked, a working plate fixedly secured to said slider to extend horizontally therefrom and having a working position for guiding and supporting the cloth, a first presser pivotably connected to said slider and extending transversely of the cloth for lifting and lowering movement over the working plate, a second presser on the base positioned on the working plate adjacent said first presser in parallel relation thereto, an upper spatula and a lower spatula mounted on the slider for lifting and lowering movement over the working plate and for backward and forward movement relative to the working position of the working plate in the transverse direction of the cloth to be tucked, said upper and lower spatulas being arranged one above the other in a position parallel to said first and second pressers and being movable up and down so as to be brought into and out of engagement with each other, a width setting bar mounted on the slider for backward and forward movement relative to the working position of the working plate in the transverse direction, and a tucking plate pivotably connected to the slider so as to be inserted between the upper and lower spatulas when the spatulas are moved away from each other.

2. An apparatus as set forth in claim 1 comprising a first lever, a spring, upper and lower arm plates and further springs, first presser being pivotably connected to said slider through said first lever and being normally pressed against the working plate by means of the first said spring, said upper and lower spatulas being pivotably connected to the slider through said upper and lower arm plates, said arm plates being juxtaposed with respect to each other and being normally pressed against the working plate by means of said further springs, said upper and lower spatula arm plates being constituted so as to be lifted and lowered in connection with the lifting and lowering movement of said first lever.

3. An apparatus as set forth in claim 2 comprising a solenoid and a second lever pivotably connected to the base substantially at right angles to said first lever, said second lever being positioned at one end below the first lever and connected at the other end to said solenoid, whereby the first presser can be moved upwardly and downwardly.

4. An apparatus as set forth in claim 1 comprising a rotatable shaft, said lower spatula arm plate being loosely mounted on said rotatable shaft which is pivotably connected to the slider, said upper spatula arm plate being fixedly mounted on said rotatable shaft, whereby said upper and lower spatulas can be moved into and out of engagement with each other.

5. An apparatus as set forth in claim 4 comprising a support plate arranged between said upper and lower spatula arm plates in a position parallel thereto, said support plate being engaged at its one end with a boss of the lower spatula arm plate on said rotatable shaft extending slidably from the slider in the transverse direction of the cloth to be tucked and being fixedly mounted at the other end on a supporT shaft extending slidably from the slider in parallel relation to said rotatable shaft, and said support plate being connected to the upper and lower spatula arm plates through said springs, whereby the upper and lower spatulas can be moved backward and forward relative to the working position of the working plate by moving the support shaft.

6. An apparatus as set forth in claim 5, characterized in that said slider includes a plurality of cam means including a first cam means for operating the width setting bar, a second cam means for operating the width setting bar, a second cam means for operating the rotatable shaft, a third cam means for operating the tucking plate and a fourth cam means for moving said upper and lower spatulas backward and forward relative to the working position of the working plate.

Images