US1786992A - Measuring and cutting device - Google Patents

Description

Dec. 30, 1930. F. a. GRONEMEYER 1,736,992

MEASURING AND CUTTING nmvxcs Filed May 4, 1928 I 2 Sheets-Sheet 1 II II II IHI II I! II II I! II "M" lllllll n In um I lllllllllllllll! Arrow rs.

1930. F. G. GRONEMEYER 1,786,992

MEASURING AND CUTTING DEVICE Filed May 4, 1928 2 Sheets-Sheet 2 F/GJ.

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Patented Dee. 3d,, 123@ am er FRED G. GRONEHIEYER, @115 ST. LQUIS, MISSOURI, ASSIGNOR TO THE BARBER ASPHALT COMPANY, @215 PHILADELPHIA, PENNSYLVANIA, A CORPORATION 01? WEST VIR- GJINM MEASURING AND CUTTING DEVICE Application filed may 4, 1928. serial Ito. 275,125.

This invention relates to a device adapted to sever measured lengths from a continuous strip of sheet material and to deliver the same to a suitable receivin station, winding machine or the like. T e illustrated embodiment of the invention is particularly designed to handle impregnated roofing felt and is arranged to cut a continuous sheet of this material into uniform lengths which are subse- 1o quently wound by a winding mechanism into rolls which may be conveniently handled.

The primary objects of this invention are the provisions, in a mechanism of the character described, of means for causing a cessation of feeding after cutting to permit removal of a previously wound length from the winder, for cutting the continuous sheet during its motion, and for securin a uniformity of length of the severed sections.

Other objects and the means for the accomplishment of the objects will be apparent from the following description considered with reference to the accompanying drawings, in which:

Fig. 1 is a front elevation of the device.

Fig. 2 is a plan view, partly in section, of the device.

Fig. 3 is a side elevation of the left side of Figs. 1 and 2. so Fig. 4 is a similar side elevation of the ri ht side of Figs. 1 and 2.

ig. 5 is a section on line55 of Fig. 2.

Fig. 6 is a section through the epicyclic gear train controlling the rotation of the feeding rolls.

In the various figures portions of the supporting frame are omitted for the sake of clearness, bearings for the shafts being indicated conventionally.

Power is transmitted to the device through a chain 2 from a suitable source, for example, motor driven reduction gearing, the chain being trained about a sprocket wheel 4 keyed to shaft 6 suitably journalled in the frame. at A bevel gear 8 is secured to the end of shaft 6 and-meshes with two bevel gears 10 rotatably mounted on. a stub shaft carried by a casmg 12. A bevel gear 13 carried by a shaft 14 meshes with bevel gears 10. shaft 14 being aligned with shaft 6. Casing 12 is journalled on shafts 6 and 14. It will be clear that, if casing 12 is held stationary, shaft 14 will be driven at the same angular yelocity as shaft 6 but in the opposite direcion.

At the other end of shaft 14 is ke ed a gear 16 by which, through the train of gears 1.8, 20 and 22, is driven shaft 24 to which the last gear 22 is keyed. The gears in this train may be changed to adjust the length of material fed between successive severings.

A gear 26 is carried by shaft 24 and meshes with a gear 28 carried by a feed roll 30 journalled on shaft 14. Gear 28 in turn meshes with a gear 32 carried by a cooperating feed roll 34 journalled in vertically slidable blocks mounted in the frame. Springs 36 engage these blocks to urge the rolls into contact, the tension of the springs being regulated through suitable adjusting means 37.

A. pinion'38 keyed to shaft 6 drives shaft 46 through a train of gears 40, 42, 44, whereby a reduction of speed is imparted. A mutilated driving gear 48 provided with teeth on only half of its circumference is keyed to shaft 46 and drives a pinion 50 whose teeth are arranged for engagement with the teeth of gear 48. Pinion 50 is of the Geneva type having an annular surface engaging the smooth periphery of gear 48 whereby its rotation is prevented when the teeth of the gears are not in mesh.

Keyed on the stub shaft which carries pinion 50 is a second mutilated driving gear 52 meshing with a Geneva pinion 54 keyed to a shaft 56. 'By the arrangement described, motion is imparted to shaft 56 during one fourth only of a revolution of shaft 46. On the other hand, the angular velocity of shaft 56 during its movement is four times that of shaft 46.

Keyed to shaft 56 is a sprocket wheel 58 over which is trained a chain 60 engaging a sprocket wheel 62 on casing 12. Gear train 38-44 and sprocket wheels 58 and 62 are so proportioned that casing 12 is rotated at one half the velocity of and in the same direction as shaft 6 during the rotation of shaft 56. As a result, shaft 14 is stationary during one fourth of each revolution of shaft 46. Feed rolls 30 and 34 will, therefore, be stationary during the same period. While it is desirable that the feed be interrupted entirely for reasons which will appear hereafter, it is obvious that casing 12 may be driven at a rate less than or greater than one half the angular velocity of shaft 6 whereby either a slow forward movement or even a retracting movement may be imparted to the sheet to provide the desired interval interrupting the forward feed of the sheet.

An elliptical gear 64, keyed to shaft 46 meshes with a similar gear 66 keyed to a shaft 68 which carries a fly knife 70 with which coo erates an anvil roll 72 mounted on a shaft 4 driven from shaft 6 through the medium of a chain engaging sprocket wheels 76 and 78 carried by the respective shafts. The peripheral speed imparted to roll 72 is approximately the speed of the sheet. The bearing blocks of shaft 74 are vertically adjustable'through hand screws 80 which thus serve to adjust the anvil roll relatively to the knife. By the elliptical gear drive shown it will be seen that knife 70 is driven at a high rate of speed during the cutting period and more slowly during the idle part of the revolution. The speed is so arranged as to be approximately that of the material during the cutting so that a clean cut is obtained.

When used for severing lengths from a sheet of roofing felt or the like, a winder either of the ordinary mandrel type or of the automatic type may be placed at the rear of the machine to receive the severed lengths and wind them in convenient rolls. After knife 70 severs a length from the continuous sheet, the interruption to the normal feed occurs due to the rotation of shaft 56 and casing 12 as above described. This provides time for the completion of the winding of the severed length and its removal from the Winder. Upon the completion of the interval the normal feed is renewed.

It will be observed that a cycle of opera tion is determined by a complete rotation of shaft 46. If it is desired to vary the length of the severed strip, other gears may be substituted in the train 1622. If such change be made, the linear velocity of the material will be varied. For relatively small changes it is found that no change of angular velocity of knife 7 0 is necessary since a clean cut'will nevertheless be formed. If it is desired,

however, to retain very close correspondence between the linear velocities of the material and knife edge during the cutting, the knife can be adjusted about shaft 68 as the linear velocity of the material is lessened, the drawings showing the blade in the position corresponding to maximum feed. The time of the interval may then be changed by adjustment of the operating parts. This, however, is unnecessary since a very slight angular shift of the knife changes its velocity during the cutting to a very considerable extent, and consequently the time of the interval will occur at very nearly the same time relative to the cutting as before the adjustment.

Byreason of the positive drive of all the parts, uniformity of length of the severed sections results. It has been found that the lengths of sheets of nominal lengths of thirtysix feet vary but one-half inch.

The strip which is to be cut is fed between rollers 30 and 34 towards the left as viewed in Fig.5, towards the knife 70. The rotation of rollers 30 and 34 is interrupted by the means described in detail above.

In the operation of the machine, the cutting of the material by the knife occurs just prior to the interruption of the feeding movement, so that a leading end of the sheet is presented which the operator ma secure to the winder. The interruption 0 feed is of such duration that sufficient time is provided for the removal of a wound roll from the winder and the proper securing of the leading end of the approaching length to a new core prior to the renewal of the feeding operation.

Having now fully described my invention, what I claim and desire to protect by Letters Patent is:

1. A machine for severing sheet material into lengths comprising means for feeding said sheet material, means for cutting said material during the feeding movement, and means for interrupting the normal feed of said material, said feeding means including an epicyclic gear train having a normally stationary member, and said interrupting means acting to move said stationary member.

2. A machine for severing sheet material into lengths comprising a roll for feeding said sheet material, a gear rotatable with said roll, a drive shaft, a gear carried by the drive shaft, a rotatable member, means meshing with said gears carried by the rotatable member, means for intermittently rotating said member, and means for cutting said material during the feeding movement.

.3. A machine for severing sheet material into lengths comprising means for feeding said sheet material, means for cutting said material during its feeding movement, means for interrupting the normal feed of said material aftera cutting operation, and means for automatically causing the feeding means 5 hereunto set my hand, at Madison, Illinois, on

this 20th day of April, 1928.

FRED G. GRONEMEYER.

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