US1813035A

US1813035A - Stitching machine for sets of sheets

Info

Publication number: US1813035A
Application number: US412385A
Authority: US
Inventors: Draeger Robert
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-11-19
Filing date: 1929-12-07
Publication date: 1931-07-07
Anticipated expiration: 1948-07-07

Description

July '7, 1931. R. DRAEGER 1,813,035

STITCHING MACHINE FOR SETS 0F SHEETS Filed Dec. 7. 1929 4 Sheets-Sheet l mini 1 V I e 415 @VIIIIIUUU/ .E

Robern Draeger \NVENTOE,

July 7, 1931.

'R'. DRAEGER STITCHING MACHINE FOR SETS OF SHEETS Filed Dec. 7. 1929 4 Sheets-Sheet 2 July 7, 1931.- R. DRAEGER STITCHING MACHINE FOR SETS OF SHEETS Filed Dec. 7, 1929 4 Sheets-Sheet 3 Kobefi Uroeaer \NVENTOK' July 7, 1931. R. DRAEGER STITCHING MACHINE FOR SETS 0F SHEETS Filed Dec. 7. 1929 4 Sheets-Sheet 4 Eobevf Draefier INVENT JKMHTTL Patented July 7, 1931 "UNITED STATES PATENT OFFICE ROBERT nnnnena, or monrnouen, FRANCE, ASSIGNQR TO DRAEGER FRERES, or

- V mon'rnonen, FRANCE I rtion.

STITGHING MACHINE FOR SETS 0F SHEETS I Application filed December 7, 1929, Serial No. 412,385, and in France November 19, 1929.

According to known methods, the sheets of books or the like are stitched by the use of'a wire forming a helical coil, whose different spiral turns traverse the set of sheets, these having been. pierced along one side with a row of holes which are spaced according to the pitch of the helical coil. In the known construction, the coil of wire is put in place by hand, but this operation requires a long time and is not of a practical nature, as the coil of thin wire can be guided only with difliculty. i

The present invention relates to a machine for the automatic stitching of preliminarily pierced sheets by the use of a wire wound in helical form, and such wire may be wound in the machine or on the outside.

According to one feature of the invention, the said machine comprises a device adapted "to hold the sheets whlle the wire is inserted, and this support is so disposed that the sheets will be pressed together and will be relatively displaced in such manner that the holes cor responding to the several sheets will form, through the set, a helical aperture having substantially the same pitch and radius as that of the saidwire.

According to another feature of the invention, the support for the sheets consists of two parallel plates between which the set of sheets is disposed. Said plates are pressed together by suitable means and have between them, 1 according to two straight lines perpendicular to each other and inclined from the horizontal suitable stops which assure by their form the relative osition of the sheets which rest .thereon by t eir own weight.

Further characteristics of the invention will be set forth in the following descrip- In the accom anying drawings, which are given by way 0 example:

Fig. 1 is a'front view of a book or the like stitched by the machine according to the invention.

' Fig. 2 is a section on a larger scale on the line 2-2 of Fig.1, showing the relative position of the sheets.

Fig. 3 is a section on the line 33 of Fig. 2.-

Fig. 4 is a front view of a machine according to the invention.

Fig. 5 is the corresponding side view.

Fig. 6 is a partial view on a larger scale, on the line 66 of Fig. 5.

Fig. 7 is a partial section, on a larger scale, on the line 7-7 of Fig. 5, of one of the stops.

Fig. 8 is a plan view, in the released position of the cam controlling the plates.

Fig. 9 is a like view in the pressed position.

Fig. 10 is a partial section showing, in the inoperative position, the shearing device adapted to cut the wire in the case in which the helical coil is wound on the machine.

Fig. 11 is a like section showing the said shearing device'at the end of its active stroke.

Fig. 12 is a section on the line 1212 of Fig. 10.

Figs. 1 to 3 represent a set of sheets, or books, which has been stitched and in which the sheets l1 etc. are joined together at the side 2 in the known manner by a wire 3 wound in helical form. The different spirals .of the wire traverse (with a slight play) the whole set of sheets through holes 4 in the sheets. The distance it between the several holes 4 is equal to the pitch of the helix.

The said sheets are thus obliged to move with reference to one another in such mannor as to follow the inclination of the said Wire. The channel 5 (Figs. 2 and 3) formed by the superposed perforations 4 of the different sheets has substantially the form of a portion of a helix Whose pitch is h. The relative displacement of the sheets may be considered as resultin from a longitudinal the plane A according to a circumference whose diameter d is the same as the diameter .of the helix.

-The apparatus according to the invention permits to give automatically to the sheets the relative positions shown in Figs. 2 and 3,

In the construction shown in Figures 4 to 12, the machlne accordlng to the invention comprises a frame 7 carrying two bearings 88 sup-porting a stationary axle 9 to which are keyed two slidable supports 1010.

Springs 1111"* surrounding said axle between the said supports 1010 and the corresponding bearing 88 urge together these two supports which carry upon their respective opposite faces suitable plates 1212 which are adapted to hold between them the sheets 1--1 etc. to be stitched together, and

which comprise two rectangular sides 13'13 and 1414 which are inclined from the horizontal.

The said

plates

12 and 12 are provided, upon their adjacent faces. with respective sleeves 1515 ,"'(F igs. 8 and 9) movable on' the axle 9 and comprising lateral ramps 16-16 cooperating with ramps 1717 pertaining to a cam 18 which is loose on the axle 9. Said cam is secured to an operating lever 20 (Figs. 4-5-8-9) to whoseend is pivoted a rod 21 leading to a pedal (or the like), not shown. A spring 22 urges 'the cam into the position shown in Fig. 9 in which the ramps 16-17 and 16 --17 are in contact,

this bringing together the plates 1212.,-

By the rotation of the said cam 18, this latter will proceed into the position shown in Fig.

8, and the two plates 12-12 will be separated.

On the plates 12--12 are mounted stops by which the sheets are held in their longitudinal direction between the two plates. On the sides 13-13, the said stops consist of a plurality of angle brackets 23 (Figs. 4-5-7) secured to the outside of one of the.

said plates, such as the plate 12? and the transverse flange of each bracket is so inclined that it will be parallel to planes A tangent to the helix, which planes A have been above specified. I

' On theother side, lit -14 of the said plates 12'-12, the stop consists of a rod 24 whose axis is 25. Said rod which is mounted on the machine frame is circular only upon half of its section (m n 39, Fig. 6), the radius of this part being equal to the internal radius of thehelix. The part m g p is thinner, and the sheets 1. 1 etc. will reston this'part (Figs. 5 and 6) in such manner that the perforations 4 will be brought upon a circular arc whose'radius is /g and whose centre is situated upon the axis 25.

In a preferred construction, the plates 12 l and 12. comprise adjacent the perforation 4 of the sheets, suitable notches 26-26 etc. of

@ tapered form, which become narrower when proceeding from the outer to the inner face of the plate. Said notches, as will be further explained, serve to uide the end of the wire having the helical orm. v

The said machine may be completed by a device by which the wire may be helically wound outside of the machine and may be then inserted into the machine, or by which the coil of wire may be directly wound in the machine itself. This latter case is herein represented by way of example.

In this arrangement, the rod 24 serving as a stop is downwardly extended by a round mandrel 27 whose axis is in line with the axis 25 of the rod 24. The said mandrel, whose radius isequal to the internal radius z of the helix to be formed, is surrounded by a sleeve 28 in which is formed a helical groove whose sunken relief represents the said helix. Said groove might also be formed in the mandrel 27, whose diameter is to be chosen in consequence, the said sleeve 28 being then smooth, or it is formed partially in the sleeve 28 and partially in the mandrel 27. In said sleeve is formed a tangential lateral channel 29 inline with a tubular guide 30 (Fig. 4) through which the wire 31 is inserted into the sleeve 28. Said wire 31 is fed into the sleeve by two feeding rollers 3233 rotated in combination in any suitable manner, for instance by bevel gearing 34'353637 from a shaft 38. The wire to be supplied is wound on a drum 39. p I

The said machine preferably comprises a shearing device adapted to out 011' the helical 1 coil when the stitching pleted. I

In the example herein, represented (Figs.

510-1 112), the shearing device 40' is slidoperation is comable in a recess 41 in the main frame. A

spring 42 urges the sameto the rear.

'arm 43 mounted on the lever 20 controlling the cam 18 separating the plates 1212 can be inserted into a mortise 44 formed in said shearing device 40. Adjacent said device there is formed in the mandrel 27 a groove 45 g will rest at the bottom upon the stops 23 and at the back upon the rod 24, and the sheets thus mutually assume automatically the relative position above specified. The pedal is then released, and under the action of the spring 22 the cam '18 will disappear (as in Fig. 9). The plates 12 '12, now released will come together by means of the springs 1111, thus pressing the sheets together.

The rollers 32-33 are then actuated, and

they feed-into the sleeve 28 the wire 31 which is thus wound along the helical groove of the sleeve 28 or on the mandrel 27. The coil thus formed will rise along the rod 24, and its upper end thus enters, as it proceeds, into the holes formed by the perforations 4 of the sheets 11 The wire is guided by the notches 26 in the edge 1414 of the plates 12-12. If desired, this guiding operation can be furthered by the use of notches in helical disposition on the rod 24 in the region corresponding to the part m n p of its section (Fig. 6).

When the end of the wire has been brought through the last hole in the set of sheets, the said rollers 33-34 are disconnected. The

-operator then presses down his pedal in order 1 such manner that it will assume the radial ited to the form of construction herein represented, which is given solely by way of example. The use of the shearing device, of varied construction, is optional and the wire can evidently be cut by hand. The device for the winding of the helical coil can be of any construction, and it may also be replaced by a suitable device (as stated) enabling the use of wires which have been wound in a helical coil outside of the machine.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a machine for stitching together a set of sheets pierced along one edge with equidistant holes by means of a wire wound in a helix, in combination: lateral guiding means parallel with the faces of the set of sheets for holding the sheets against each other, a guiding rod having a cross section lesser than the cross section of the free internal space of the helically wound wire when inserted in the holes of the setof sheets and provided with a curved longitudinal face adapted to bear on the edge of the set of sheets adjacent to the holes, and guiding means obliquely inclined with relation to the faces of the set of sheets and adapted to bear on one of the edges of the set of sheets adj acent to the edge bearing on said rod, whereb said channels are given a substantially helical form.

2. In a machine for stitching together a set of sheets pierced along one edge with equidistant holes by means of a wire wound in a helix, in combination; two substantially vertical plates between which the set of sheets is adapted to be inserted and guided, a guiding rod between said plates obliquely disposed with relation to the horizontal, having a cross section lesser than the cross section of the free internal space of the helically wound wire when inserted in the holes of the set of sheets and provided with an upper curved longitudinal face on which is adapted to bear by gravity the edge of the set of sheets adjacent to the holes, and other guiding surfaces between said plates obliquely inclined with relation to .the horizontal and with 'rela'tion to the faces of the set of sheets and on which is adapted to bear by gravity the lower edge of the set of sheets adjacent to the edge bearing on said rod. i

3. In a machine for stitching together a set of sheets pierced along one edge ,with equidistant holes by means of a wire wound in a helix, in combination: two plates adapted to be moved towards and away from each other and between which the set of sheets is adapted to beinserted, a guiding rod between said plateshaving a cross sectionlesser than the cross section of the free internal space of the helically wound wire when inserted in the holes of the set of sheets and provided with a curved longitudinal face on which" is adapted to bear the edge of the set of "sheets adjacent to the holes, guiding surfaces between said plates obliquely inclined with relation to said plates and on which is adapted to bear one of the edges of the set of sheets adjacent to the edge bearing on said rod, and means for pressing the plates towards each other.

4. In a machine for stitching together a set of sheets pierced along one edge with equidistant holes by means of a wire wound in a helix, in combination: a stationary shaft, two plates splined on said shaft, and between which the set of sheets is adapted to be inserted, yielding means urging said plates towards each other, a cam loosely mounted on said shaft between said plates, means for rotating said cam, cooperating surfaces on said cam and on said plates whereby said plates may be moved away from each other against the action of said yielding means, a guiding rod between said plates having a cross section lesser than the cross section of the free internal space of the helically wound wire when y with relation to said plates and on which is adapted to bear one of the edges of the set of sheets adjacent to the edge bearing on said rod.

5. In a machine for stitchingtogether aset of sheets pierced along one edge with equidistant hoies by means of a wire wound in a helix, in combination: two plates between which the set of sheets is adapted to be inserted, a guiding rod between said plates having a cross section lesser than the cross section of the free internal space of the helically wound wire when inserted in the holes of the set of sheets and provided with a curved longitudinal face on which is adapted to bear the edge of the set of sheets adjacent to the holes, guiding surfaces between said plates obliquely inclined with relation to said plates and 011 which is adapted to bear one of the edges of the set of sheets adjacent to the edge bearing on said rod, and guiding surfaces formed in said plates for guiding the helical wire during its insertion intosaid holes.

6. .In a machine for stitching together a set of sheets pierced along one edge with equidistant holes by means of a wire wound in a helix, in combination: two plates between which the set of sheets isadapted to be inserted, a guiding rod between said plates hav- 20 ing a cross section lesser than the cross section of the free internal space of the helically Wound wire when inserted in the holes of the set of sheets and provided with a curved longitudinal face on which is adapted to bear I I the edgeof the set of sheets adjacent to the holes, guiding surfaces between said plates obliquely inclined with relation to said plates and on which is adapted to hear one of the edges of the set of sheets adjacent to the edge bearing on said rod, and guiding surfaces formed inthe outer part of said rod for guiding the helical wire duringits insertioninto said holes. a. v

7 In a machine for stitching together a set of sheets pierced along one edge with equi distant holes by means of a wire wound in a I helix, in combination: lateral guiding means holes, means for feeding on said rod a Wire wound into helical form, and means for shearing said wire near the end of said rod adjacent to said feeding means for the wire.

9. In a machine for stitching together a set of sheets pierced along one edge with equidistant holes by means of a wire wound in a helix, in combination: lateral guiding means parallel with the faces of the set of sheets for holding the sheets against each other, a guiding rod having a cross section lesser than the cross section of the free internal space of the helically wound wire when inserted in the holes of the set of sheets and provided with a curved longitudinal face adapted to bear on the edge of the set of sheets adjacent to the holes, and with a longitudinal groove on the opposite face, means for feeding on said rod a wire wound into a l 1elical formand means for shearingsaid wire opposite said groove and for bending the cut end of said wire into ROBERT DRAEGE L' parallel withthe faces of the set of sheets for holding the sheets against each other, a guid- 40 ing rod having a cross section lesser than the cross section of the free internal space of the helically wound wire when inserted in the holes of the set of sheets and provided with acurved longitudinal face adapted to bear .on the edge of theset of sheets adjacent to the holes a mandrel in line with said rod and within which is provided a helical channel and an inlet straight channel from said helical channel to the exterior of said mandrel, a reel of wire and feeding rollers adapted to feed wire from said reel into said inlet channel, through said helical channel, around said rod and into the holes of said set of sheets.

8. In a machine for stitching together a set of sheets pierced along one edge with equidistant holes by means of'a wire wound in a helix, in combination: lateral guiding means parallel with the faces of the set of sheets for holding the sheets against each other, a guiding rod having a cross section lesser than the cross section of the free internal space of the helically wound wire when inserted in the holes of the set of sheets and provided with a curved longitudinal face adapted to bear on 65 the edge of theset of sheets adjacent to the