US1926932A - Cutting machine - Google Patents

Description

Sept. 12, 1933.

K. IBIAGOSCH CUTTING MACHINE :5 Shets-Sheet 1 Filed NOV. 3, 1931 Sept. 12, 1933. K. BIAGOSCH CUTTING MACHINE Filed Nov. 5, 1931 s Sheets-Sheet 2 4 Sept. 12, 1933. K. BIAGOSCH CUTTING MACHINE Filed Nov. 5, 1931 3 Sheets-Sheet 3 Patented Sept. 12, 1933 UNITED STATES CUTTING MACHINE Karl Biagosch, Leipzig, Germany Application November 3, 1931, Serial No. 572,835,

and in Germany November 25, 1930 5 Claims.

This invention relates to cutting machines and particularly to machines of this. character for cutting cardboard, paper and the like and the invention has for an object the provision of novel means for moving paper on a table with relation to which a knife is operated.

It is a further object of this invention to provide novel means for transmitting power to operate the knife intermittently and furthermore to provide means for transmitting motion from a source of power to means for moving material to be cut into operative relation with the knife and furthermore, to provide means on the knife operating instrumentalities for arresting the knife in its elevated position while the means for moving material to be cut operates to bring a new length of material under the knife, the said invention including means for causing a dwell in the operation of the feeding means while the paper is being cut and likewise to cause a dwell in the operation of the knife while the material moving means is operating to move the material under the knife. 'By reason of this relation of parts a greater capacity for the reception of paper under the knife is created where the paper feeding means and knife operating means are timed to operate in the manner stated.

In order that the advantages of the invention may be comprehended it may be stated that cutters with an automatic feed dependent on the knife motion of the machine, that is, cutters which have no individual drive for the automatic feed, separated from the drive of the'knife by a movable clutch, have the disadvantage that only half the opening between the knife and the table may be used; or, expressed differently, the knife motion is nearly twice as great as the usable opening. This is true for the automatic feed can only function during the top half of the up and down strokes of the knife, during which time the pile of material in the machine will not collide with the knife when it is brought forward by the automatic feed. During the lower half of the up and down strokes, that is, during the cutting pe riod, the crank controlling the automatic feed is making its back stroke. To make possible the construction of a cutter with a knife motion slightly greater than the usable opening between the knife and the table, separate drives have been provided for the knife motion and for the automatic feed, either of which can be put in or out of operation independentlyby a movable clutch. This independence of the two motions has disadvantages: as each of the two motions possesses an individual drive, each of which must (Cl. Hi l-48) have an individual transmission, unnecessarily increasing the cost of the machine and, furthermore, each cutting operation must be started and stopped by one or the other of the two clutches being engaged and disengaged, or both must be used alternately, which means that the clutch must always start from a dead stop subjecting it to premature wear and causing inaccuracies in the automatic feed. In addition, a number of rods must be moved to engage and disengage the clutches.

On cutting machines 'now known, for example, those on which the automatic feed is put into operation by a movable clutch after the cut has been made by the knife and it has come to a stop and on which the clutch controlling the knife motionmust again be engaged after the back stroke of the drive controlling the automatic feed has been made and the clutch disengaged, the two clutches controlling the knife motion and the automatic feed must continually be engaged and disengaged alternately. Furthermore, asthe back stroke of the crank controlling the automatic feed occurs while the knife is not in motion, the capacity possibilities of the machine are decreased asno actual work is being performed during this period. On those machines, on the other hand, on which the crank controlling the automatic feed is continuously in motion once the clutch has been engaged, andon which the knife motion occurs during'the time used by the back stroke of the crank controlling the automatic feed, the time consumed by the back stroke is productive, inasmuch as the knife motion takes place while it is being made. However, on machines of this type, it is necessary that the clutch of the individual knife drive be engaged and disengaged before'and after the operation of the, automatic feed, so that the knife comes to a stop during the period in which. the automatic feed is functioning. The movable clutch which controls the knife action, in addition to the fact that it must continually be engaged and disengaged, has the great disadvantage that as soon as a partial slippage of the clutch occurs during the knife motion due to wear, the knife is not promptly put intomotion due to this slippage, hence the knife will not again have reached the highest point of the upstroke before the next movement of the automatic feed occurs, so that the pile of material in the machine is still under clamp pressure at the beginning of the feed and the functioning of the automatic feed will 1m avoidably be disturbed.

Furthermore, with this type of construction,

the speed of the knife motion is dependent on the speed of the automatic feed to the extent that the up and down strokes of the knife must be completed during the back stroke of the crank controlling the automatic feed, irrespective of whether or not this speed is too high for the material to be cut satisfactorily. However, it is an established fact that the speed of the knife motion may not be chosen indiscriminately. On the contrary, the choice of speed is limited if a clean out of the material is to be obtained. Accordingly, if the required speed is used, the speed of the automatic feed which in general may be higher than that of the knife is slowed down which is identical to a loss in production.

All the disadvantageous factors of the type of cutters known up to the present time are eliminated by the present invention insofar that on the one hand all engaging and disengaging of movable clutches during the operation of the machine is eliminated, as the drive for the knife motion and for the automatic feed are entirely dependent on each other, as both of them are in constant compulsory connection with the gear of the machine shaft which is constantly revolving once the machine has been put into operation, and that on the other hand, the speeds of the knife motion and the automatic feed may be selected according to the proven practical requirements, without diminishing the output of the machine by any unproductive movements. Additional practical advantages in the operation of this machine are the simplicity and dependability in operation of the construction.

With the foregoing and other objects in view the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings forming part of this application wherein like characters denote corresponding parts in the several views, and in which Figure 1 illustrates a view in plan of a cutting machine embodying the invention, the same being partly in section;

Figure 2 illustrates a front elevational view thereof, partly in section;

Figure 3 illustrates a section on the line 3--3 of Figure 1 with certain parts in position at the beginning of movement;

Figure 4 illustrates a similar view with the parts at the end of movement;

Figure 5 illustrates a section on the line 55 of Figure 2; and

Figure 6 illustrates a detail showing a certain clutch used herein.

In the drawings illustrating this invention only those parts of the frame directly concerned in supporting parts of the working mechanism are included therein.

Accordingly, there is shown in the present embodiment, a pair of side frame members 10 which are connected by a cross frame member 11. Suitable bearings 12 support a main or driving shaft 13 and one end of this shaft projects to the right of the machine and on this projecting end is mounted a freely revolving drive pulley 14 on which is mounted a clutch member 15. A second clutch member 16 cooperating with the first, is splined on the shaft 13 and is moved by the usual shipper means (not shown) to clutch and unclutch the shaft and driven pulley. The driven pulley maybe belted as usual to any suitable source of power. On the inner end of the shaft 13 is a worm 17 which meshes with a worm wheel 18 fixed on a horizontal shaft 19, the bearings for which are shown at 20.

On the shaft 19 against the worm 18 is fixed a gear 21 and on a stub shaft 22 mounted parallel to the shaft 19 is an interrupted gear 23. At the ends of the toothed portion of the gear 23 are mounted rollers 24. On the gear 21 is fixed a disk 25 of a type sometimes called a Geneva stop. This disk has one portion of its periphery of such radius as to engage both rollers 24 simultaneously while the remainder of the periphery is of such radius that the rollers will not strike this part as the gear 23 rotates. At one end of the portion of greater radius is a starting dog or tooth 26 and at the other end of said portion is a stopping dog or tooth 27. With this arrangement, rotation of the gear 21 effects intermittent rotation of the gear 23 in the following manner. During the rest or dwell of the gear 23, the rollers 24 are engaged by the disk 25 so that the gear 23 can not accidentally move. The shaft 19 rotates in the direction of the arrow A, in Figure 1, and this rotation brings the dog 26 into engagement with one of the rollers 24. As this dog is at the end of the large radius portion of the disk 25, the engagement with the roller occurs at such time that the rollers are freed from the disk and thus the dog can not turn the gear 23 and bring the toothed portion into engagement with the teeth of the gear 21 and the gear 23 revolves until the lug 27 is engaged by one of the rollers 24 whereupon the motion of the gear 23 is stopped and the dwell again begins. On the other end of the shaft 19 is a gear 28 meshing with an interrupted gear 29 mounted on a shaft 30 and provided with rollers 31. A Geneva stop disk 32 is carried by the gear 29 and has a starting lug 33 and a stopping lug 34. These parts act in the same manner as like parts just described. However, the arrangement of the disks 25 and 32 is such that the gear 23 rests while the gear 29 is revolving and revolves while the gear 29 rests. gears 23 and 29 rotate alternately. Each member 10 carries a bearing 36 wherein is journaled a rock shaft 37 having a rock arm 38 fixed thereon. These rock arms are connected by a link 39. Also, the rock shafts carry rock arms 40 which are connected by links 41 to the knife carrier 42, carrying a knife 43. The left hand shaft 37 furth r has a third rock arm 44 which is connected by a pitman 45 to a crank pin 46 on the gear 23. This crank pin is so positioned that when the knife is in its highest position, the gear wheel 23 will be at its dwell or rest position.

The gear 29 also carries a crank pin 4'7 which is connected by a pitman 43 with an arm 49 fixed on the shaft 50 which also carries a beveled gear 51. This beveled gear meshes with a second beveled gear 52 fixed on a shaft 53. The shaft 53 carries on its upper end an arm 54 having a slot 55 therein and a pin 56 is mounted to slide along the slot 55 and be secured in adjusted position.

The throw of the crank pin 47 and the length of the arm 49 are so proportioned that the revolution of the gear 29 effects oscillation of the shaft 50 and arm 54. Mounted in the bearing 57 is a shaft 58 on which is mounted a gear wheel 59 wherewith meshes a rack 60 carried on a bar 61 having its end pivoted on the pin 56. Now, it will be plain that oscillation of the arm 54 will effect oscillation of the gear 59 and that the extent of oscillation of the latter is controlled by the position of the pin 56 in the slot 55. On the shaft In other words, these 58 is also mounted a belt or band wheel 62 carrying an internal ratchet wheel 63, the teeth of which are engaged by pawls 6% carried by the gear. Thus, the wheel 62 is given a step by step rotation. A belt 65 runs around this pulley 62 and around a suitable idler, not shown, and the said belt runs under a table 66 which supports the material such as paper or the like to be cut, and over the table a bar, follower or pusher 67 is movable which engages the material to be cut to push it forward.

A finger 68 projects downwardly from the bar and passes through a slot 69 in the table top, and is secured to the band or belt 65 whereby the follower or pusher is moved.

Reference has been made in the specification to the material, cardboard or the like to be cut, and where material is mentioned, it is to be understood that reference is made generically to any object or objects which can be moved on the table into operative relation with the knife and which is to be severed into appropriate lengths.

Further from what has been said of the objects of the invention, it will be obvious to one skilled in the art that the instrumentalities heretofore described will result in the objects stated and since the operation of the several parts of the mechanism and their coaotive relation to other parts of the mechanism have been stated in describing the several elements, it is believed unnecessary to include a resume of the operation an understanding of the invention.

Also in using the term continuously operated power transmitting means it is understood that the continuous operation refers to the time when the machine is in use and is not of course intended to be construed literally as being for all time.

A clutch '70 (see Fig. 6) is provided on the shaft so that the gear 51 may be connected to and disconnected from said shaft and the feed thus caused to be either automatic or not, as desired.

I claim:

1. In a cutting machine, a table, a knife mounted for operation with relation thereto, mechanism for moving the knife, gearing for actuating said mechanism, mechanism for moving material on the table, gearing for operating said mechanism, a continuously driven member, and automatically controlled means for intermittently and alternately transmitting the motion of the continuously driven member to the first and second mentioned gearing.

able with relation thereto, mechanism for supporting and imparting motion to the knife, a continuously driven worm, a worm wheel engaged thereby, a shaft on which the worm wheel is secured, gear wheels in spaced relation to each otheron the shaft, a rotatably mounted interrupted gear wheel in operative relation to each of the aforesaid gear wheels, means associated with the first mentioned gear wheels for intermittently arresting and imparting motion to the interrupted gear wheels, mechanism moved by one of the interrupted gear wheels for imparting motion to the knife operating means, and mechanism operated by the other of said interrupted gear wheels for actuating the feeding mechanism for the material to be cut.

8. In a cutting machine, a table, a knife operable with relation thereto, mechanism for supporting and imparting motion to the knife, a continuously driven worm, a worm wheel engaged thereby, a shaft on which the worm wheel is secured, gear wheels in spaced relation to each other on the shaft, a rotatably mounted interrupted gear wheel in operative relation to each of the aforesaid gear wheels, means associated with the first mentioned gear wheels for intermittently arresting and imparting motion to the interrupted gear wheels, mechanism moved by one of the interrupted gear wheels for imparting motion to the knife operating means, and mechanism operated by the other of said interrupted gear wheels for actuating the feeding mechanism for the material to be cut, and means for controlling the degree of movement of the last mentioned mechanism.

4. In a cutting machine, a reciprocable knife, a material feeding device for feeding material into the path of said knife, operating means for the knife including a gear, operating means for the feeding device including a second gear, and a continuously revolving interrupted gearing positioned to mesh alternately with the gears of the operating mechanisms.

5. In a cutting machine, a reciprocable knife, a material feeding device for feeding material into the path of said knife, operating means for the knife including a gear, operating means for the feeding device including a second gear, a continuously revolving interrupted gearing positioned to mesh alternately with the gears of the operating mechanisms, and means holding each operating mechanism gear from rotation when out of niesh'with the interrupted gear.

KARL BIAGOSCH.

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