US1678410A - Machine for preparing paper to enable portions to be easily detached - Google Patents

Description

July 24, 1928. 1,678,410 w. w. WARRENIGTON MACHINE FOR PREPARING PAPER TO ENABLE PORTIONS TO BE EASILY DETACHED 76/ Flled Dec. 17, 1925 9 FT&. 1

-Patented July 24, 1%28.

srarss rarest orrics;

WILLIAM WALTER HARRINGTON, 0]? SUMMER HILL, NEW SOUTH ALES, AUSTRALIA;

MACHINE FOE PBEPAEENG PAPER TO ENABLE PORTIONS TO BE EASILY DETACHED.

Application filed December 17, 1925,8eria1 No 76,068, and in Australia August 6, 1925.

usual to perforate the paper so that the portions required maybe easily detached.

.Many types of perforating machines have been devised but none of these machines are entirely satisfactory or remain sofor any length of time. it slight imperfection in the line of perforationsrenders the part to be detached liable to be torn in the act of detaching or the perforations are uneven and unsightly, while in most cases where the sheets are to be bound the perforations cause a thickening of the pile to -be bound, along the line of perforations, and these thickened portions must be hammered down or other wise flattened, before the sheets can be bound.

The object of this invention is to so weaken a sheet of paper along a line or lines across the surface thereof that the sheet may be divided into sections by tearing the paper along the weakened line or lines and to provide a means to achieve that object. The weakening of the sheet ofpaper is effectedby insertinga number of regularly spaced depressions by compressing the paper at those points until only an extremely thin film of paper forms the bottom of those depressions which are each separated from one another by a bridge that is integral with and forms an unaffected part of the sheet.

The means adopted for inserting these depressions may be varied and may be either in the form of a hand or power machine, the essential features of which will comprise a wheel or wheels having specially shaped teeth and being rotatably mounted axially parallel with and vertically above a rotatable anvil with which it is suitably geared so that the two will rotate at the same speed but in opposite directions to one another, means for regulating the operative distance between the teeth on the wheel or wheels and that portion of the periphery of the rotating anvil immediately adjacent'thereto andfor rigidly maintaining that distance so that the pressure exerted upon the paper as it is passing between them will be equal, a stripper device for stripping the paper from the specially shaped teeth, means for depressembodying the essential features necessary for carrying my invention into effect, a portion ofthe bridging beam being cut away to enable the parts behind it to be more clearly illustrated.

Fig. 2 is a sectional elevation taken on the line A-A of Fig. 1 but with certain parts cut away to economize space.

Fig. 3 is afront View of a toothed wheel, the counterweighted leverby which it is carried, a portion of the shaft that rotates the wheel and also that upon -,wl1ich the counterweighted lever is mounted, the pressure regulating screw and a portion of the stripper device.

Fig. 4c is a sectional elevationof the cam mechanism by which the pressure roll, that depresses the counterw'eighted lever arm is operated. I

Fig. 5 is a diagrammatic view of the combined cam and tripper by which the pressure shaft is rotated through an arc in opposite directions.

Fig. 6 is a sectional elevation taken through the line of depressions and showing portion of the wheel in operation.

Fig. 7 is a plan View of a portion of a sheet of paper showing a line of depressions therein.

lhemachine shown inithe drawings is an adaptation of a well known type of perforating machine, certain parts of which have been removed and replaced by'those necessary for carrying my invention into effect.

'13 thereon must .be such that the possibility of cutting or perforating the paper is eliminated, for it will be seen that if this happens the teeth upon the wheel would contact with and be destroyed by the anvil 25.

The pressure wheel 12 is therefore tapered on each side towards its periphery, the teeth being formed by a suitable number of equally spaced radial incisions 1d. They will be thick in the plane of rotation but narrow and slightly convex across their faces. The machine may be provided with any suitable number of these pressure wheels each one being mounted in bearings carried at the forward end of a lever arm 16 the rear end of which is shaped to form a counterweight 17. Each lever arm 16 is slidably mounted upon a shaft 18 and provided with a set screw 19 to enable it to be fixed to the shaft temporarily at any desired position. The shaft 18 is mounted at each end in bearings 20 formed in the hearing blocks that are secured in any suitable manner to the respective standards 21 that also serve to support a table 22 upon which the work will be performed. Each of the wheels 12 will be keyed or otherwise rigidly secured upon a shaft 23 one end of which will be supported in a loose fitting bearing 2-1 to enable it and the wheels 12 secured thereon to be slightly raised by the counterwe'ght- 17 on the lever arm as will be hereafter explained. Vertically below the wheels 12 and parallel with the axial line thereof is a rotatable anvil 25 that is mounted in suitable bearings carried by the stand ards 21. One end of the rotatable anvil extended so that it may be driven by any suitable and convenient means and will be provided with a gear wheel 26 that meshes with a gear wheel 27 rigidly secured to the shaft so that the shaft 23 and rotatable anvil will rotate at the same speed butin opposite directions to each other. That portion of the rotating anvil lying between the standards 21 should be of the same diameter as the wheels 12 in order that their peripheral speed shall be equal. The rotatable anvil 25 is positioned so that its axial line is below the table 22 the upper surface of the table being; approximately tangential to the uppermost peripheral surface of the anvil. This arranpgennnt is effected by providingthe table 22 with a loneitudinal slot 28 the uiulcrneath edges of which are bevelled in order that the anvil may project upwardly into the slot 28 and preferably a fraction above the upper surface of the table.

Pressure is applied to the wheels 12 by means, of a pressure shaft 30 the ends of which are mounted in bearings in the respective standards 21 so that the axial. line thereof will lie in the same vertical plane with the axial lines of the shaft- 23 and rotatable anvil. 25. The pressure shaft 30 is provided with a longitudinal flat 3O to enable it to function as a cam in the following manner. The forward end of the lever arm 18 is provided with a screw threaded vertical hole to receive an adjusting screw upper surface of the table 31. The location of this adjusting screw is such that in its operative position its axial line will. lie in the same plane with but at right angles to the axial line of the shaft/23 and that of the rotatable anvil 25 and will be provided with alocl: nut 32 for the purpose of locking it in any required position. Unless the pressure shaft be of an abnormally large dian'ieter there is an uncertainty as to the pressure exerted upon the heads of the adjusting screws 31 owing to a slight bending; of the shaft. To eliminate this possibilty a bridging); beam 33 is provided with ends adapted to be rigidly secured to the respective standards 21 by the bolts 34:. The bearings for the pressure shaft 30 are formed partly in the bearing blocks and partly in the underside of each of the re spective ends of the bridging' beam 33, the underside of the latter being provid d with a preferably semi-circular longitudinal recess 3G to receive the shaft. In this manner the shaft'may be partly rotated in one direction so as to apply downward pressure when the circular portion of its periphery engages with the upper surface of the head of the adjusting screw 31 thereby depressing the pressure wheel or wheels 12 against the counterweight or weights 1'? and when rotated in the opposite direction so that the flat 30 thereon lies horizontally above the screw, permitting the counterweight or weights to come into operation for the purpose of lift-- ing; the wheels 12 a short distance. The vertical movement of the wheels 12 is only required for the purpose of enabling a sheet of paper to pass freely between the teeth on the wheel and the anvil so that the amount of movement necessary is very small. The shaft being free at one end and secured loosely in bearings at the other end will permit of all the 'ertical movement that is required.

in order to insure that theteeth 13 on the wheel or wheels 12 shall not remain in engagement with the-depressions 10 formed in the paper as it passes between the wheel and the rotatable anvil 25 a stripper plate 29 is secured to the underside of the lever arm 16 by the screws 37.

horizontally and in close proximity to the The foot piece will have central longitudinal slot 39 through which the wheels may partly project as will be seen by referring particul rlv to Figs. 1 and 2 in the accompanying drawings. The forward extremity of the foot piece is bent upwardly in order to form a guide for the paper as it is being fed into the machine. 2

The means adopted for partly rotating the pressure shaft 30 may be varied and may be operated either by hand or mechanical power. The appliances shown inthe accom- It is provided with a forwardly 1)1O]((fl;111 f foot piece 38 that lies no /aim panying drawings are such that either means maybe used, They comprise a lever dO one end of which rigidly secured to a projecting: end of the pressure shatt O the other end being connected 4-0 to the upper end of a connec 'ngrod 41. AtFigs. 1 and 2 of the drawi the lever lO has been drawn downwardly by the conneting rod/l1 tl iereby rotating the pressure shaft 30 so as to bring the circular portion of its periphery into contact with the'l'iead ot the screw 31 whereby the lever armor arms 16 and wheel or wheels 12 are depressed. In this position the paper may be fed into the machine by the feed rollers 12 42 arranged inany well known manner so that they rotate at the same peripheral speed the wheels 12 and rotatable anvil. The paper passes thence under the upturned portion of the foot piece 38 and from thence passes between the depi ssed wheel 12 and anvil 25 when it receives the line of depressions 10. l'lavlng left the rear end foot piece 38 of the stripper plate 37 the paper will be received by and passed outwa-"dly by the rollers 4:3 and 43 which will be arranged similarly to the teed i W' hen the paper has rollers 42 and 42. passed from between the wheel 12 and rotatable anvil 25 or when reaches a predetermined point the connecting rod will be moved upwardly and in doing so Wlll move the lever 40 causing the pressure shalt 30 to move through an are so as to bring the flat 3O thereon to a horizontal plane above the heads of the screws 31.

her d of the screw 31 the counterweirgh s (or their equivalents) will operate so as to slisrhtly raise the forward end ot the lever arm or arms 16 and the wheel or wheels 12 and shaft 23 connected thereto.

, The connecting" rod 41 could be operatedby a treadle attachment The means shown of the wheel. Thesepins 48 and 4.9. operate a tripping device 50 that is secured upon short shaft 51. carried in bearino's formed in the boss '52 on the bracket 52- that is rigidly secured to the standard 2].. Integral with or rigidly secured to the tripper 50 is a cam 53 the function of which is to move the connecting: rod 41 longitudinally up and down as the tripper 50 is moved first through During; this movement immediately the circular perlphcry of the pressure shaft, 30 leaves the an arc in one cirection by the pin 48 striking and depressing the toe piece 48 of the tripper and then through an arc in the opposite direction when the pin 49 strikes and de presses the toe piece 49. The operation of the cam 53 will be seen more clearly illustrated at Fig. 5 ofthe drawings but as it nd the partsassociated therewith are well known. inthe art to which this invention beit is not considered necessary to enter into any further detailed explanation. I claim 1. A machine for the purpose herein described, comprising a driven shaft, a plurah ity of wheels mounted thereon and having peripheral teeth, a rotatable anvil mounted in bearings below and a ally in the same vertical plane with the di iven shaft, adJustable means for maintaining the toothed wheels at a predetermined distanceifrom the rotz-rtable anvil, means whereby the driven shaft and rotatable anvil may be driven in opposite directions so that the wheels upon the driven shaft and the rotatable anvil will travel at the same peripheral speed and means for feeding' the paper between the toothed. wheels and the rotatable anvil.

2. A machine for the purpose herein described, comprising a driven shaft a plurality of wheels mounted on said shaft and having suitably spaced teeth, a'rotatable anvil mounted below and axially in. the same vertical plane with the driven shaft, adjustable means for depressing; the toothed wheels and maintaining them rigidly in the depressed position for a given period and at a predeteri'nined distance from the rotatable anvil, means for automatically raising the wheels a predetermined distance when they are released by the depressing means, means whereby the driven shaft and rotatable anvil may be driven in opposite directions so that the wheels and the rotatable anvil will travel at the same peripheral speed and means for feeding the paper between the toothed wheels and the rotatable anvil.

3. A. machine as claimed in claim 2, characterized in that the wheels are slidably mounted upon the driven shaft and are each secured in bearings carried near one end of a lever arm that is slidably mounted. upon a shaft pivotally secured in suitable bearings, the other end of each lever arm being pro? vided with a counter weight adapted to raise the corresponding wheel when released by the depressing means. p p

4.1%. machine as claimed in claini Q where in adjustably mounted lever arms are provided for mounting the wheels and having counterweights connected therewith wherein the depressing means consists of a pressure shaft arranged parallel w'th the aXialline of the wheels and above the ends of the lever arms by which they are carried,'

said pressure shaft being arranged in suitand p lIlO ably mounted bearings and having a longitudinal fiat portion whereby its action will be that of a cam, depressing the underlying end of each lever arm while the circular portion of its periphery contacts therewith and permitting it to be raised by the counterweight. when the longitudinal fiat portion is brought into juxtaposition with said lever arm, the driven shaft being so mounted in bearings as to permit it to rise with the wheels that are mounted thereon, and means for partially rotating the pressure shaft alternately in opposite directions.

5. A machine as claimed in claim 2, where in adjustably mounted lever arms are also provided for mounting the wheels and means such as screws and lock nuts for the purpose of regulating the distance between the wheels and the rotatable anvil when the lever arms are in their fully depressed position.

6. A machine as claimed in claim 2, wherein a tripper device is associated with each wheel and includes a slotted foot that lies transversely above the rotatable anvil so that the wheel projects slightly through the slot when the wheel is in the depressed position, the forward end of said slotted foot being turned upwardly to form a guide under which the paper will pass as it is being fed into the machine.

7. A machine as claimed in claim 2, where in adjustably mounted lever arms are provided for the Wheels and wherein the depressing means includes' a rotatable shaft having a hat portion and a circular portion, and means such as a bridging beam for pre venting the pressure shaft from bending when the circular portion of its periphery contacts with the lever arms.

In testimony whereof I have signed my name to this specification.

WILLIAM WALTER WVARRINGTON.

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