DE6606912U - BLIND STITCH SEWING MACHINE - Google Patents

Description

HÖGER - LEGAL RIGHTS - GRIESSBACH - HAECKER

PATENT LAWYERS IN STUTTGART

A 34 719 ro
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November 2nd, 1965

Union Special Machine Company Chicago, Illinois, U.S.A.

Blind stitch sewing machine

The invention "generally refers to a Blind stitch sewing machine, and-especially that means at such a · machine, which serves to drive a diver. Specifically, · has {the invention to deal with problems as examples ieppichen it the use of blind stitch sewing machines for edging of ^f or similar material with tape in the blind stitch type occur when the carpets or the like. consist of an upper fiber layer and a rubber layer glued or otherwise attached to the underside of the fiber layer.

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When using conventional blind stitch sewing machines »·« ■ _(TRE th various difficulties related to the above purpose Thus it has been found that the use of conventional machines during the Säun]. -

'". ** ^r ODeration to frequent needle breaks and tearing or

Slitting open the relatively stiff, rubber-like underside des' carpet leads. Such a coating material, as it is used today in carpets, consists in the Usually made of hard rubber or synthetic rubber, both of which ■ ** " • ·, * · have essentially the same properties. Investigations have shown that the difficulties that arise arise that the diver previously used in such machines from his position forming a bulge is withdrawn again before the liade ^ ie vom

^. diver leaves bulge formed. This creates a ·. ζ '\ downward movement of the bulge of the like to be sewn material to ^r EU a substantially horizontal abutment against the bearing surface of the presser foot., prior yet "Üie needle exits the material. The resulting force applied to the curved needle, down Directed force leads to frequent needle breakages, especially in the case of relatively thick and stiff material

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If the coating is relatively stiff, the material will be torn or cut open as this is relatively Stiff rubber material pulls down, so that a defective finished product results. These shortcomings arise especially with the particularly stiff layer material made of rubber, which has recently been popular.

In connection with the present invention, the mentioned difficulties overcome by a special temporal movement of the diver. There will be precautions taken to make the diver effective over a substantial period of time, during which time in that to be sutured Material in the path of the arch needle a bulge is maintained. The preferred according to the invention The arrangement is such that the bulge is held in place over approximately 180 ° of one revolution of the main shaft of the machine will. This ensures that the diver reliably overcomes a bulge in the path of the needle path in the hewn material forms and holds the time in which the needle is in the material to be sewn. As a result, the Needle from the material during the entire machine operating cycle no perceptible bending force is impressed, because the sewing material has no possibility of oich from dec Away from the needle when the latter is in the fabric

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is located. In this way there is the advantage that the objectionable results, such as occur when working with known diving mechanisms, are avoided and a uniform blind stitch seam is created in the sewn material.

· · In connection with the foregoing, the invention draws connections between the main shaft and the diver considering which the latter in its effective, 'the Hold the bulge-forming position as long as the needle lingers in the material. This is achieved preferably by a cam driven by the main shaft, which the Holds diver in its advanced active position over about 180 °. The control curve likes one for this purpose have a triangular or triangular shape, with a part of their circumferential surface having a larger radius from their Axis of rotation extends over an arc of about 180 °, while the other two parts of the circumferential surface over one smaller radius from the axis of rotation. The Urofangs The surface of the control cam is not flat in any area

or flat, but slightly curved everywhere in order to achieve the desired triangular effect in this way. Because the diver will participate in this training of the control curve

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a rotation of the control cam of 90 ° into its effective position, remains in this position during an angle of rotation of about 180 ° and moves back over the remaining 90 °.

The aforementioned control cam acts with a right-angled

formed the head of a connecting rod, which carries a roller at the upper end, which in turn interacts with the Urafangsflache _, the control curve. The connecting rod is forced down by a spring to hold the roller against the primary surface of the control cam. The arrangement is • '. in such a way that the connecting rod is held in its uppermost position when the control cam is rotated 180 ° and can move downwards during a further 90 rotation of the control cam, in order to follow the next rotation of the control ₍ * cam over 90 ° move up.

A arranged on the drive shaft, with the same but not rotatable member is vercehcn with vertically opposed fitting surfaces which cooperate with ise vertically lying in 'a similar W _e surfaces on the head of the connecting rod to the latter to prevent any horizontal movement by the control cam so that the Crank rod with certainty only a simple lowering

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. performing right back and forth motion.

Another feature of the invention is the arrangement of a diver drive mechanism, which is easy in its time - the borrowed effect can be adjusted in order to

/ free, periodic movement as well as a flawless V.

to reach the diver. In this way, with; Safety the bulge in the Uähgut up into the train

! the Kadel held during the period in which

■; the needle is in the kabgut. Moreover, the invention is >

I do proper construction that the height of the diver in the

effective position is easily adjustable to during the Time in which the l \ 'adel is in the i * ähgut a bulge of the desired expansion depending on the

I to maintain the strength of the material to be teased.

\ ( . Further features and advantages of the invention result in connection with the accompanying drawing from the following description. It shows:

I; Fig. 1 is a longitudinal section of a blind stitch sewing

machine;

^; Fig. 2 shows a cross section along the line ^r . ■. 2f2 from Fig. 1;

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Pig. 3 is a partial view of the foremost feed device;

FIG. 4 ″ shows a part of the rearmost feed device; -

Pig. 5 a south view of the lower machine partly along line 5-5 of Figure 1;

Pig. 6 is a bottom view of part of the machine, partly in section;

Pig. 7 is a perspective, exploded view of the diver, his shark, part and part of its movement device;

Pig. 8 a scheraatic representation of the against-r '

side relationships of certain parts rend of the diver's operating cycle;

PIg. 9 is a partial view of the diver drive and associated adjustment means;

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( Pig. a view similar to Pig. 9 in section Pig. _% along line 10-10 of Figure 1; •. - '■■■■ · ■ Pig · 11th Fig. a plan view of the upper end of the crank- '-' f., ■ "'Pig. 12th rod for the diver drive; ; '·' ·.,. Fig. • a front view of the top of the regimen Q " 13th bel rod with the drive shaft in cross section :, ■
J ■ , · a front view of the control cam for an ⁴ ^ 14th drove the connecting rod; 15th a side view of the control cam from Pig. 13; « • a perspective view of a with egg 16 nem needle bearing, at the top end of the
• connecting rod arranged roller; a perspective view of one of the Main shaft freely carried sliding block, the the top. End of the connecting rod opposite a horizontal movement with respect to the Main shaft holds; ·

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Pig. 17 is a perspective view of a

Part of the upper end of the connecting rod and

Pig. 18- a movement diagram of diver and Needle.

The blind stitch sewing machine shown corresponds in its basic structure essentially to the type in the USA patent. 2 280 468 (Bowroan) ^ is described. The main sub-, difference between the machine according to the invention and the pa- * - tented machine lie in the drive connection of the Machine head shaft with the diver to "this the one before." special temporal movements mentioned above. *

As can be seen from the drawing, the erfiadur.ss _x according to the improved machine has a housing with a base 10, a vertical stand 11 and an overhanging arm 12, the latter holding downwardly extending housing parts 12a and 12b, the different parts of the mechanism still to be described. A main drive shaft 13 is supported in corresponding bearings 15 and 16 and extends in the longitudinal direction parallel to the overhanging arm 12. At the right end (Pig. 1), a handwheel 14 combined with a pulley is attached to the shaft 13. The pulley

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can be connected to an electric motor or other drive source via a belt, while the handwheel ν ■ ^r allows manual turning of the drive shaft in order to adjust the position of various machine parts, if necessary,

The necessary mechanical ones go from the main shaft 13 ·

(Drive connections to the different, while the stitch • formation. Moving mechanisms in. These mechanisms include fabric feed rolls, a reciprocating needle, zusätz _u Liehe stitch image-Emean, such as a rotating claw, • "'.. A swing gripper and a spreader and a diver,

which at the right time creates a bulge in the sewing material ·. forms, specifically in the area of the stitch-forming means.

("The connecting means with the main drive shaft to the intermittent Rotation of the upper material feed rollers, which move the material against a stationary presser foot or a similar one Fabric wing at the base of the machine housing press and which preferably three rotatable rollers - close, are actuated by spherical eccentrics 17 and 18, which are on the oWelle 13; are attached. The eccentric 17 encloses a spherical head at the upper end of a connecting rod 19. The upper end of a crank acts in the same way.

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belstarge 20 together with the eccentric 18. The lower ends of the two connecting rods are connected to Yorschubantriebshe _r leg or arms, which are used to drive ratchet wheels 22 and 22 by pawls. Means suitable for this purpose are given in the above-mentioned US patent. As there 'is shown, the arrangement is such that the feed of the {' Vcrschubrollen in a simple V else can be adjusted to the desired S + ichlänge /. Like from Pig. 4, the ratchet wheel 21 is mounted on a shaft 21a which at the other end carries a group of feed rollers or rollers 21b. In Pig..3 it is shown how the ratchet wheel 22 is fastened in a similar manner on a Y file 22a, which at the other end carries several feed rollers or rollers 22b. (The two sets of feed rollers may be provided along the feed direction of the fabric in the area of the stitch formation zone. "Substantially aligned with each other in this sense.

The rollers 21b are arranged behind the rollers 22b. The two

Role groups can, however, if desired, with reference on 'the direction of advance by a certain amount • borrowed to be offset from one another.

Pur the drive of the needle of the stitch formation mechanism is a provided on the shaft 13, spiral toothed wheel 23, which is connected to a not shown on a

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Shaft "attached, spiral-toothed wheel 24 cooperates. A crank part 25 is located on the shaft carrying the wheel 24 attached with a counterweight which carries an eccentrically arranged pivot pin 25a. The latter is with one Connecting rod 26 connected to give this reciprocating movement. An arm 26a of the connecting rod is standing from a bolt 25b, * with which it is connected, to the rear. The bolt 25b is slidably mounted on an arm, not shown, in order to allow oscillating movements to give a fixed axis, like this in Pig. 2 of U.S. Patent 1,176,415. Through this connection

- fertilize the individual parts are set to their correct trajectories and the arm 26a is used to move a (not shown) needle-thread take-off part. The lower * E.ide of the connecting rod 26 is articulated to an arm 27., which extends rearward from an oscillating yoke or needle carrier 28. The latter is preferably

j oe U-shaped and mounted pivotably about pin 29, the pegs being carried by the housing. A needle clamping part 28a extends forward and downward from the yoke 28, dao is used to hold a curved needle 30. From the above Explanations and Fig. 1 shows that t-r'.die Needle 30 is pivoted over an arc in a vertical plane, which in a pointed v / inke ^ -? On z, B, 45 ° to on which the vertical section plane of Fig. 1 lies.

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For the formation of a! Iaht, as it is in the already mentioned
U.S. Patent 2,280,468 works with "the
Needle 30 together a rotating gripper 31, with which in turn oscillating gripper or spreader (not shown) cooperate to form the stitch. For the details ('■ of the construction, arrangement and mode of operation of the additional ₍ ■ borrowed stitch-forming means is referred to the above-mentioned USA *

Patents referenced. At this point it should only be mentioned

that the stitch forming means is driven by that Yfelle
be, which carries the "spiral toothed wheel 24, and zvar
Via a second spiral-toothed wheel 32 attached to the shaft. The various stitching elements are appropriately mounted on parts 12a and 12b of the housing. ■. ■■ "". Through the interaction of needle 30, rotating hook, ■ - '. and Schv.'inggreifer or spreader according to the specified Pa- -. '.' One of those shown in Patent 2,280,468 may be used

C- '■ ·' ·· ■ · -. · ■■

■ ■ seams are made. '·

'The following is referred to the Pig. 5 and 6 referred to. The carpet to be sewn is fed through the feed roller len 21b and 22b over the surface of a presser foot unit 34 advanced. The unit includes a front idler and a pair of rear support rollers 34a and 34b. These roles

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and the actual presser are normally held in an adjustable raised position, so the TEP ^r pichmaterial into engagement with the feed rollers 21b and 22b

, · to keep. Precautions are taken if necessary

ι. lower the mentioned presser foot elements so that the sewing

can be easily inserted or removed. Before that concerned fenäe mechanism is described is- however pointed out = assign that a diver 35 is provided who is certified

\. kai can move into the area of the needle swivel arch in order to create a bulge in the material in the Yfeg of the needle

'■' shape. The diver has a groove 35a at the top for the needle to pass through. The diver also has a laterally extending arm 36 which is mounted in a diver support and drive part in a manner to be described below.

. c · .. ■■ ·

· "" ... The following is the mechanism for raising, lowering and Setting the presser foot unit is described. In Fig. 6 a V / elle 37 is shown, which in the main housing of the Ma- ' machine is stored. Outside the said housing, the ball 37 carries a rearwardly extending one towards the rope Part 38, the free end 38a of which lies parallel to and in an area next to the diver. The part 38 is means two letters. "Lea 59 * attached to V.'elie 37. The fabric rollers 34a and 34b are attached to a swivel arm 40 ",

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having an I 40a, which in turn is mounted on a pin 41 which in turn secured in a bore of the I ¹ Iaschinengehäuses means of a clamping screw 41b * st A screwed into ÖON pin 41 screw 41 used to freiachwenkbaren holding the hub 40 on the pin 41 . With ucS SchTr6riksr "iD 40 is one ends sinss Lenksrs 42 'through.

a screw 42a articulated, while the other end of the handlebar with a screw 42b on the down extending part of the pivot part 38 is articulated. The arrangement is that the two pivot parts 38 and 40 are moved uniformly to make rollers 331 and 34a

• Hold 34b at the desired height. · On shaft 37 is an arm 43 is also attached (FIGS. 2 and G), which is held in an adjustable position to the full by screws 43a. One at the outer end of the arm 43 attached spring 44 is used to pivot the arm counterclockwise '(Fig. 2), The other end of the spring 44 is of a; Hook 45 held, The more it is vertically adjustable, the more the tension of the spring

■ to change. ·.

In order to limit the upward movement of the presser foot assembly including rollers 33, 34a and 34b are adjustable Funds provided. These means can include, for example, a stop member (Fig. 6) which is secured by a

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ben 48 at the right end of the shaft 37 attached Arn) 47 is worn. The stop part 46 is designed as an adjustable screw, the free end of which cooperates with the lower surface of a horizontally only ^v , ckende part ± m the upper section of the base 10 of the machine housing.

Means are also provided with which an operator can lower the presser foot including rollers 33, 34a and 34b. In this way it is easy to insert and remove the sewing material. The means for pivoting the shaft 37 comprise a pivot shaft 49 (FIG. 6) which is mounted in corresponding bearings in the base of the machine housing and which extends forward from the front of the baais. At the previous end of the, wave ·. 49 a toggle lever of known type is attached to enable the operator to pivot the shaft 49 'by moving the toggle lever slightly to the right. On .. the shaft 49 is also an arm 50, which has a hub with clamping screws 51 / which firmly connect the arm to the shaft 49. A protrusion 50a of the arm 50 cooperates with a projection 47a -des _u arm 47th The projection 50a is preferably held at a straight distance above the projection 47a, so that the knee lever remains unaffected by slight pivoting movements of the arm 47 due to different fabric thicknesses to be sewn during the operation of the machine.

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The plunger 35 extends with its pin 36 into the laterally projecting arm 52a of a swing or a swing part 52. The pin 36 is held by clamping screws 52b in a position that is adjusted to match the arm 52b. Of the . The main part of the swing part 52 has a cylindrical opening VOiI VSjTuSx vüiσϊϋαω * g qji CucU a / Üa "C ιΐΠϊσσο SX", uXc uSr nüxnauES SI- nes support part 53 which is fastened eccentrically on a shaft 54. The shaft 54 is appropriately supported in a bearing part 54a (Pig. 6) of the housing base and in a bushing 54b carried by the housing. The shaft 54 is nor = _vv , sometimes kept immobile, but can still be closed in a

. illustrative way are slightly changed in their angular position. As best from the exploded view the pig. 7, the right end of the 1 shaft 54 extends through a sliding block 55, which is a cylindrical Has opening 55a. An eccentric is located inside the opening 55a 56, through the opening 56a of which the shaft 54

, eccentrically sur opening 55a of the sliding block 55 extends. The eccentric 56 is on the shaft by a clamping screw 5 <5b 54 attached (Pig. 2). The sliding block 55 is slidably mounted within a fork-shaped part 57. The part has opposing surfaces 57a along which the sliding block can slide a limited amount. The part

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is connected to part 52 by a screw bolt 58 the bolt 58 has a cylindrical portion which

^r lies in a cylindrical opening 57c extending through part 57. The threaded part of the bolt 58 is screwed into the threaded bore 52b of a laterally extending arm 52c of the swing part 52. A forward section 57b of part 57 is provided with an opening

'Provision for receiving a pin 59 which has a ball head 59a. The ball head is enclosed by the bearing shells 60a at the lower end of a connecting rod 60 (FIG. 2). At the upper end of the connecting rod 60 there is a head, generally designated 61 ′, which interacts with a control cam 62 described below, the control cam 62

. has a cylindrical part 62a at one end (Pig · 1 »13 and H), which is used to receive clamping screws 63 serves to fix the control cam on the shaft 13, wherein the shaft 13 according to the dashed line in Pig. H extends through the control cam. Of the actual curve part of the control cam 62 has a semi-cylindrical outer surface 62b, which is located in the upper region of the Pig * 13 extends over an arc of 180 °. The remaining Lower surface 62c of the curve part has the one in Pig. 13th contour shown, so that in Pig. H seen from the left, the control cam as a whole on half of its circumferential surface

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has the same distance from the axis of the shaft 13, while the remaining part of the circumferential surface is at a distance of the axis of the shaft 13, starting from the two ends of the surface 62b to the lowest point of the surface 62c in FIG. 13 .

The head part 61 of the connecting rod 60 has a part 64 with a recess c 'for receiving and enclosing the control cam 62 is provided. The part 64 also has an opening 64a which communicates with said recess is. A bolt 65 arranged in the upper end of the part 64 carries a roller 66 (F.-g. 11 and 15) with a needle bearing 66a is mounted freely rotatable about the bolt 65. A U-shaped part 67 is provided on one surface of the part 64, which has cylindrical openings 67a and 67b. The openings serve to accommodate connecting bolts 68 and 69 for fastening of the part 67 on the part 64. On the shaft 13 is a stone 70 with perpendicularly extending on opposite sides Arranged surfaces 70a, which cooperate with adjacent surfaces 67c of the part 67 »On one side of the Stone 70, as best shown in FIG. 16, two laterally extending flanges 70b are provided. These serve to work with the surfaces 67d of the part 67 together. The stone 70 is used in an advantageous manner for guidance

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of the upper part 64 of the connecting rod 60, while this moves vertically and continues to keep the connecting rod in vertical alignment. A spring 71 (Fig. 1) is connected at its upper end to a screw bolt 72 which is carried by the head 61 of the crank rod £ o. The lower end of the spring 71 is connected to a bolt V3, which in turn is firmly connected to the vertical part 11 of the machine housing by means of a nut 74. In addition, nuts 75 are provided on the bolt 73 to hold the lower end of the spring 71 in the correct position. The force of the spring 71 serves to keep the roller 66 constantly in contact with the surface of the cam portions 62b and 62c to keep. This way the up and down movement becomes dee T 'chers 35 controlled upon rotation of the shaft 13.

Precautions are taken to maintain the vertical position of the diver (more precisely his upper end) to vary slightly, with regard to the sewing material, if the Divers moved up and down through the curve surfaces 62b and 62c will. For this purpose, a handlebar 76 is provided, which by a bolt 77 with an extended end 78 of the Part 53 is connected. A clamping screw 79 holds the bolt 77 in the extended end 78 of the part 53. Clamping screws 80 connect this part to the shaft 54, so that

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it is carried along when the shaft rotates. The upper end of the handlebar 76 is connected to the lower one by a bolt 81 End of a socket 82 connected within a tubular Part 83 of the stand 11 of the Maschir> engehäuses arranged is. The inside of the socket 82 is threaded to receive a screw bolt 84. The bolt is rotatable Ia mounted on a cap 85, which is connected by screws 86 to the upper end of the tubular part 83 of the housing. is bound. At the upper end of the bolt 84 is a clamping screw 87a a knurled head 87 attached the latter can be easily rotated by the operator and is by a fired bolt 88 which has detents or teeth in the corresponding lower surface of the head 87, held in the set position. Longitudinal movements of the bolt 84 are

that by button 87 and a splash 84a opposite to Y Side of the cap 85 rest against, prevented. By turning the button, the bolt 84 is engaged its threaded part into the internal thread of the bushing 82, the latter moving up and down depending on the direction of rotation Such movements are transmitted through the link 76 to the part 78 and serve to rotate the shaft 54 around a certain limited amount. From Pig. 2 shows that when the shaft 54 is slightly counterclockwise

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is rotated meaning ^ the eccentric 56 lifts the sliding block 55 a little, which-further serves to raise the bolt 58 and the ^ ^r projection 52c on the swing part 52, the latter

Part that! Diver wears. During this adjustment, the bolt 59 _f, which interacts with the lower end of the connecting rod 60, is advantageously held in its position. If the eccentric 56 is rotated slightly in this way in one direction or the other, the eccentric 55 carrying the rocking part 52 is also rotated within the same, whereby the entire part is given upward and downward movements this allows fine adjustment of the diver and the upper and lower ends of his vertical

(th trajectory caused.

Like in Pig. 8, causes the shaft to move counterclockwise a rectified movement of the part 57, whereby the swing part 52 is slightly clockwise is rotated (Pig. 7). At the same time it does that Swing part carrying eccentric 53 a lowering of the acnae,

around which the swing part pivots. It turned out to be favorable

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To connect eccentric 53 and eccentric 56 to the shaft 54 that a line from the axis of the latter through the point d <? R maximum eccentricity of the eccentric 53 is rotated approximately 148 in the counterclockwise direction with respect to that line which the axis of the shaft 54 with the point of the flximile eccentricity Aaa Hx ^ otrfeers 56 connects * These described relationships between the parts mentioned can also be varied somewhat according to the invention.

In Figure 18 are the desired relative timing adjustments the movements of the needle, the diver and the The machine's fabric feed mechanism during a cycle of movement shown. At the beginning of the cycle, the needle is at the 0 ° position of the parts in their right position. The needle moves during the first 180 ° of the rotation of the drive shaft to ~ .left and during the remaining 180 ° of the rotation the wave to the right. During the time the needle is bending to the left to the 105 ° position, the diver has the liähgut raised in the path of the needle. Because of the special ' Curve control means for the rope maker, the latter is more effective This position is held until the needle has moved out of the material to be sewn, which corresponds to a time at which the drive shaft has rotated about 255 °. When the diver moves down away from the fabric, the needle is no longer in the sewing material, so that neither on the needle nor on the liähgut

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Damage can occur. The fabric feed mechanism starts feeding with the next stitch at about 290 ° des Drehzyklua de * 'main shaft. The advance of the sewing material ^ a wi.'d at about 40 ° of the next cycle of movement of the drive shaft completed. So this takes place before the diver Währeltd of the next cycle comes into effect on the material. The result of this is that there is no bending force on the needle and on the sewing material is not pulled as long as the needle is in the sewing material. '

'As shown in Fig. 18, the diver is during about ''. 150 ° of one revolution of the drive shaft is held in its effective • "or highest position. This angle of revolution can be changed between about 140 ° and 180 ° in order to achieve the object on which the invention is based, and it is understandable will be that the contour of the control cam 62 can be selected so that the respective desired size, this Angle is reached.

With an appropriate setting of the crank member 25 and / or the control cam 62 in the circumferential direction of their shafts, the relative times of needle movement, the service life and the movement of the diver can be varied by a desired amount to optimize the functioning of the mechanism achieve.

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Claims (1)

A 34 719 mm - 123
11/11/1965 claims - 1st blind stitch sewing machine with a main drive shaft and ί: drive connections derived therefrom for a sewing material , -. feed device, a sewing needle and a diver, wel- * rather, the sewing needle is a bulge in the material to be sewn forms, characterized in that the drive connection * '(52, 53 »57, £ 0) between the main drive shaft (13) and the diver (35) includes a control member (62) that the ■. Diver in its effective, the bulge-shaping Holds position as long as the sewing needle (30) remains in the material to be sewn. · "" ·. · '. '* ■ ·. ■ • 2. Blind stitch sewing machine according to claim 1, characterized by "marked net that the diver (35) during a rotation of the main • ¹ drive shaft (13) between about 140 ° and 180 ° in its effective position is kept. . ν "3. blind stitch sewing machine according to claim 1 or 2, characterized in that the diver (35) on a horizontally protruding" ■ ■ standing arm (52a) via a connecting rod (16) with _u the main drive shaft (13) connected swing (52) is ordered to-L ', which gives the diver a substantially verti- \ kai poppet movement. - 2 ■ - 660691217.12.70 A 34 719 m
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11/11/1965 4. Blind stitch sewing machine according to claim 3 »characterized in that the swing (52) on a cylindrical Support part (53) is pivotable, which in turn is rotatable about an eccentric shaft (54). 5. Blind stitch sewing machine according to spoke 3 or 4, characterized in that that cer 2ragteil (53) in its angular position on the eccentric shaft (54) by a button (8Y) and a handlebar (76) is adjustable. 6. Blind stitch sewing machine according to one of the preceding claims, characterized in that the one on the main drive shaft (13) and via the connecting rod (60) the diver (35) moving, designed as a control cam (62) control member for holding the diver in his effective position has a circular cylindrical control surface (62b) which extends at least over an angle of 140 ° and the axis of which coincides with the shaft (13). 7. Blind stitch sewing machine according to one of the preceding claims, characterized in that one of its ends (57b) is articulated to the connecting rod (60) dener pivoting part (57) on the opposite, fork-shaped ; . 660691217.1Z70 Λ 34 719 W. ro - 123 11.11.1965 - 3 - formed end (57a) carries a sliding block (55) which an eccentric (56) seated on the shaft (54), and that the pivot part (57) is articulated to the swing (52) between its ends (57b, 57a). 8. Blindatichnähmaochine according to cbn claims 4 and 7, characterized in that the points of maximum eccentricity on the eccentric (36) and on the Tragteii (53) are offset from each other by an angle of about 180 (Pig. 8), so that by turning the Eccentric shaft (54) the end position of the diver (35) is adjustable. * t 9. Blind stitch sewing machine according to one of the preceding claims, characterized in that for mutual ·; Match the drive connections of needle (30) and Divers (35) are adjustable. · | 10 »Blind stitch sewing machine according to one of the preceding Proverbs, characterized in that the diver '(35) by a peder (71) is biased into its lowest, inoperative position. * 11. Blind stitch sewing machine according to one of the preceding claims, characterized in that for vertical 6606912 12/17/70 AM 719 m
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11/11/1965 wheel guide of the crank rod (60) on the main drive shaft (13) rotatably seated sliding block (70) is provided on which the head (64) of the connecting rod in . vertical guide surfaces (67c) «leads. .12. Blind stitch sewing machine according to one of the preceding claims, characterized in that on the head (64) a roller (66) is arranged on the connecting rod (60) and runs on the control cam (62).