US1033306A - Book-sewing machine. - Google Patents

Description

L. EGGER. L BOOK SEWING MACHINE. APPLICATION FILED AUG. 29, 1910.

Patented July 23,1912.

' 2 SHEETS-811113132.

LOUIS EGGER, F BRUG-GEN- ST. GALLEN, SWITZERLAND.

BOOK-SEWING MACHINE.

To all whom it may concern:

Be it known that I, Louis EGGER, engineer, residing at Bruggen-St. Gallen, Switzerland, have invented certain new and useful Improvements in Book-Sewing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to machines for sewing books; and it consists chiefly in arranging the main driving shaft with its operating cams and connections above the level of the receiving table for the sewed sheets, and in certain other novel features of construction hereinafter fully described and claimed.

In the drawings, Figure 1 is a front elevation and Fig. 2 a side elevation of the machine. Fig. 3 is a cross-section through the upper portion, and Fig. 4 a front elevation of the same portion of the machine, partly in section. Fig. 5 is a plan of the above mentioned toothed wheel gear for operating the thread stretching device and rotating the hooked needles.

This machine has eye needles and hook needles arranged in pairs and supported in heads 50 and 48 respectively. A base plate 75 and two side standards 6 and 7 are provided. The receiving table 73 for the sewed sheets is supported between the standards 6 and 7, and the main driving shaft or spindle 13 is arranged considerably above the table 73 and a little above the line 84 which indicates the top of the sheets where sewn together to form the back of the book.

The shaft 13 has a disk 11 provided with three cam surfaces secured on its left hand end, and on its right hand end adisk 12 is secured which is provided with two cam surfaces. The disk 12 has gear teeth on its periphery which gear into atoothed wheel 85 of the same diameter. The toothed wheel 85 is journaled on a pin 86 which projects from the standard 7 and it carries the cams 36 and 45.

The spreading table consists of two plates 1 and 2 and two levers 3 and 4 carrying the said plates and pivoted about a spindle 5 mounted in two bearings 78 and 79. For moving the said table, to the levers 3 and 4 Specification of Letters Patent. Application filed August 29,

are pivoted rods 8 and 8 connected to le- Patented July 23, 1912. 1910. Serial No. 579,385.

vers 9 and 10 operated by the cam disks 11 and 12 secured to the horizontal shaft 13 mounted in the standards or brackets 6 and 7.

The levers 9 and 10 are pivoted to a spindle 14 (Figs. 1 and 2).

On the pivoted table is mounted the thread guide as well as the perforator. The former consists of a longitudinally adjustable horizontal rod 15 mounted in the two table levers 3 and 4, the hooks 16 being secured to the said rod 15. This thread guide is operated by means of a double lever 17 pivoted to the bracket 80, and of cam 18 acting on the said double lever. A spring not shown in the drawing, pulls the rod 15 to the left hand side in such manner that the roller 19 is always held in engagement with the cam disk 11 (Figs. 1 and 2). I

The perforator or apparatus for the preliminary perforation, consists of a bar 20 provided wit-h smooth needles or pins 22 and mounted in a vertically adjustable manner in the guides 21 and 21. For moving the bar 20, connecting rods 23 and 23 engage with it, and are connected to levers 25 and 25 secured to a spindle 24 mounted on the levers 3 and 4 parallel to the shaft 5. To the spindle 24 is further secured a lever 26 engaging with the fork 27 ofthe lever 28. The latter is secured by means of a spindle 29 rotatably mounted in the standard 6, to the lever 30, and is operated from the cam disk 11 (Figs. 1 and 2).

In the outer position of the table (shown in chain dotted lines in Fig. 2), the device for the preliminary perforations is no longer connected to the lever 28, while the lever 26 in the inner position of the spreading table (in which the sheet to be sewn or stitched on, is under the sewing needles), is again in engagement with the fork 27 of the lever 28. In the lateral standards 6 and 7 is rotatably mounted a spindle 81 for the parts for stretching the thread, and a spindle 3l'for operating the sheet taking ofi device. To the spindle 81 are secured two arms 32 and 33 connected together by means of across bar 34 and operated from the cam disk 36 by means of a lever secured to the spindle 81 (Figs. 1 and 2). The sheet stripping off device consists of two levers 37 and 37 se cured to the spindle 31, connected together by means of a cross-bar 38 and operated from the lever 9 which acts by means of a connecting rod 40 on the lever 46 secured to the spindle 31.

In the bearings arranged on both sides of a cross-bar 41 secured to the lateral stand ards 6 and 7, is rotatably mounted the spindle 42 for operating the clamping jaws 4?) intended for temporarily jamming the thread and screwed to the cross-bar 41. To the spindle 42 are secured the two levers and 82 which by means of a lever 44 secured to the said spindle,

them and is grasped by cam 45 moves the lever 44 them lease of the thread.

To a cross-bar 46 justable in the guides 47 and 47, are secured the sewing or stitching heads 48 in which are rotatably mounted the mandrels 55 carrying the hooked needles. In the crossbar 46 is mounted a horizontal, longitudinally adjustable bar 49 to which are secured the sewing heads 50 carrying the eye needles. For vertically reciprocating the bar 46, it is connected to rods 51 and 51 which are connected to levers 53 and 53 secured to a spindle 52 mounted in the lateral. standards 6 and 7 To the spindle 52 is further secured a lever 54 operated by the cam disk 12 (Figs. 1-4).

The rotation of the hooked needles is ef-.

fected by means of toothed wheels 56 secured to the mandrels 55, and of a horizontally adjust-able tooth rack 83 mounted on the cross bar 46, an arm 58 carrying a roller 57 being secured to the said tooth rack 83, and operated by the cam 59 (Figs. 3 and 4). The roller 57 is held in engagement with the cam 59 by means of a spring not shown in the drawing and constantly pulling the tooth rack 83 to the right. The cam 59 is made spiral in such manner that during the vertical reciprocation of the cross-bar 46, the tooth rack 83 can be horizontally moved.

For making the zigzag stitch, the bar 49, and therefore the sewing heads 50 secured to it, together with the eye needles, are horizontally moved. The bar 49 receives its movements by means of a cam disk 60 driven by means of toothed wheels 61 and 62 and traveling at half the speed of the main spindle 13 carrying the cam disks 11 and 12. The cam disk 60 acts on the guide 63 horizontally adjustable on the spindle 14 and carrying at one end the arm 64 provided with a fork 68, and at the other end secured to a ring 66 carrying the roller 65, owing to a pressure spring 67 constantly pressing the and of a cam disk 5 45 acting on the said lever, close or open the 3 The 1 clamping jaws 1-3 are of any approved conj the thread is placed between i When the I and the arm 82 in one direction, the said arm 82 operates one of the clamping aws so as to effect the reroller 65 against the cam disk 60. The fork 68 in its turn engages over a roller 69 mounted on a bolt 70 passing through the slotted cross-bar 46 and secured to the bar 49 (Figs. 3 and 4).

If the so-called brochure stitch is to be made, the lateral shifting of the guide 63 is prevented by the introduction of the pin 71., so that the eye needle always stitches at the same point (Figs. 3 and 4).

Y3 is a sheet metal table on which restthe sheets 74 sewn or stitched together. According to the size of the book to be sewn or stitched, the said table is placed at a higher or lower level by means of the spindle 7 6 guided in the table plate 75, and of the hand wheel 77 (Figs. 1 and The working of the machine described is as follows: the sheet 72 to be sewn or stitched on, is placed on the spreadingtable 1 which is in he outer position shown by which 1s vertlcally ad- 1 chain. dotted lines in Fig. 2. After the spreading table has brought the sheet 72 under the stitching needles, the sheet is perforated by the perforator pins 22 and through the holes produced, pass the eye needles introducing the thread, and at the same time also the hooked needles with their hooks facing forward. The thread guide 16 will then seize the thread introduced by the eye needle, bring it in front of the hooked needles which in the meantime have been turned to an angle of 180 and will introduce it into the latter. During the upward movement of the needles, the thread brought by the thread guide 16, will be seized by the hooked needle, and the thread loop seized will be drawn through the loop of the sheet sewn on before, which loop surrounds the hooked needle, whereupon the hooked needle is again turned to 180.

During the above process, the thread stretching device acts on the thread so that the latter is kept taut. After the thread guide has returned to its normal position laterally of the eye needle, the spreading table will swing again into the outer position shown in chain dot-ted lines in Fig. 2, while the sheet stripping off bar 38' will press the projecting branch of the sheet just sewn on, against the sheets sewn on before. A new sheet is then placed again on the spreading table, and the above described process repeated.

hat 1 claim is:

1. In a book sewing machine, nation, with a frame, of a driving shaft journaled in the frame, a face cam 60 journaled in the frame, driving wheels for revolving the said face cam from the said driving shaft but at a slower speed, a crossbar 46 carried by the frame, a bar 49 slidable horizontally in the said crossbar and provided with. a projecting bolt, a support ing spindle 14 carried by the said frame, a

the combispring-pressed guide 63 slidable on the said spindle and engaging with the said face cam, and an arm secured to the said guide and operatively connected with the said bolt.

2. In a book sewing machine, the combination, with a frame, and a crossbar 46 carried by the frame; of sewing heads 48 se-- cured to the said crossbar, mandrels 55 journaled in the sewing heads and provided with hooked needles, toothed wheels 56 secured to the said mandrels, a toothed rack 83 carried by the said crossbar and gearing into the said wheels, an arm 58 secured to one end of the said rack and provided with a roller, and a revoluble cam which engages with the said roller and slides the said rack horizontally so that it revolves the said mandrels at periodic intervals.

3. In a book sewing machine, the combination, with a frame, and a crossbar 46 carried by the frame; of a longitudinally movable bar 49 mounted on the said crossbar and provided with a projecting pin 70, sewing heads 50 secured to the bar 49, eyeneedles carried by the said sewing heads, a

spindle 14 carried by the frame, a springpressed sleeve 63 slidable longitudinally on the said rod, a forked arm secured to the said sleeve and engaging with the said pin 70, an operating arm also secured to the said sleeve, and a revoluble cam 60 engaging wit-h the said operating arm and sliding the bar 49 periodically.

4. In a book sewing machine, the combination, with a frame, two levers having their lower ends pivoted to the frame, a spreading table carried by the said levers, two revoluble cams, a single driving shaft having the said cams secured on it, two operating levers having their middle parts engaged by the said cams, and connecting-rods between the adjacent and free end portions of the said operating levers and spreading table levers; of a rock-shaft 31 mounted in the frame above the said spreading table, stripping-0E device comprising two levers 37 and 37 secured to the rock-shaft 31 and having their free ends connected together by a crossbar 38, a lever 46 secured to the rock-shaft 31, and a connecting-rod between the lever 46 and the upper end portion of one of the said operating levers which actuate the spreading table.

In testimony whereof I affix my signature, in presence of two witnesses.

LOUIS EGGER.

Witnesses ALwIN FEHVIG, RANDALL ATKINSON.

Copies of this patent may be obtained for five cents each, by addressing the Washington, D. C.

Commissioner of Patents,

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