US2454861A - Machine for cutting handholes - Google Patents

Description

q 0, 1948- A. c. COKER MACHINE FOR CUTTING HAND HOLES s She'ets-Sheet 1 Filed Jfily 23, 1945 I N V EN TOR.

Nov. 30,1948. v A, okgz v2,454,3 1

MACHINE FOR CUTTING HAND Homzs Filed July 23, 1945 3 Sheets-Sheet 2 Nov. 30, 1948. A. c. coKER MACHINE FOR CUTTING HAND HOLES Filed July 23, 1945 3 Sheets-Sheec 3 INVENTOR.

Patented Nov. 30, 1948 UNITE D STATES AT ENT F F I CE MACHINE FOR CUTTING HANDHOLES Alvaflla-yboume (Joker, San Antonio, Tex.

Application July 23,1945, Serial No. 606,570

Claims. (Cl. 1454.136)

This invention relates to a machine for cutting hand holes in cases such as commonly employed for holding beverages in bottles.

Heretofore, the operation of producing hand holes in cases has been a comparatively slow operation. due primarily to the fact that it has been necessary to reverse the position of the work in order to produce the desired rounded edges at bothsides of the Opening or hand hole.

An object of the present invention is togreatly simplify the construction of machines for the purposestated' whereby it is especiallysuited for high speed. quantity production.

It. is a further object to provide a machine of simple construction, the working parts of which areall accessible readily.

With the foregoing and other objects in View which will appear as the description proceeds, theinvention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing. from the spirit of the invention as claimed.

In the accompanying drawings, the preferred formlof. the invention has been shown.

In said drawings:

Figure 1 is a top plan view of the machine.

Figure 2 is aview partly in elevation and partly in, section asv viewed from the right of Figure 1.

Figure 3 is a side elevation of the machine, a portion beingin section.

Referring to thefigures. by characters of ref.- erence, I designates the main frame of the maamt provides a mounting for a motor 2 adapted to transmit motion through belt and pulley mechanism 3 to a transverse shaft 4 journaled on the frame. Pulleys 5 are secured to shaft 4 adjacent opposite sides of the frame and serve to transmit motion through belts 6' tooppositely disposed aligned spindles. 1: which are also journaled on the frame. These spindles are spaced apart atthei'r inner ends and said ends carry replaceable boring, and reaming" bits 8 which are oppositely disposed, as shown.

Secured in the frame with the spindles 1 extending" between them, are guide rods 9. These rods are parallel and are slidably engaged by the respective ends of a carriage Ill having a central longitudinal opening II. This carriage is below the level of the routing bits 8 and is adapted to be shifted along the guide rods 9 by a lever l2 fulcrumed between its ends, as at I3 and having chine, which can be of any suitable proportions.

a yoke I2 at its upper end which embraces and engages a portion of the carriage so that when the lever is shifted, the carriage is moved therewith. A laterally tiltable pedal M is fulcrumed between its ends in the bottom portion of the frame at one end, as shown at It and is provided with a centrally located upwardly extending arm I6 having a pivotal and sliding connection l'l with the lower end of lever l2. Thus when one end of the pedal is depressed, the yoke l2 and the carriage are moved in one direction as indicated by broken lines Figure 2, and when the other end of the pedal is depressed, the move-- ment of the parts isreversed. Mounted in the carriage so as to rocki about a pivotal connection I8"; is a jig l9 proportioned to receive the case end or other work to beshaped. This jig has upwardly extending side walls 2 0 each of which is provided with a slot 2"! concomtrio with the axis of movement of the jigand proportioned to receive one of the routing bits.

From one of the walls 20- there is extendeda handle 22* while pivotally connected to the other side of the jig is a frame 23 havinga handle 24 adaptedto" overlie the engaged work and toner mally rest close to or in contact with the handle 22 so that both can be grasped by one hand of the operator; The pivotal connection between frame 23 and thejig has been indicated at 2-5.

In practice, the handle 24 is swung away from the handle 22 so that the work, W thus can be placed in the jig. The distance between the tworouting bits is greater than the thickness of thework, so that when the jig and carriage are in their normal or intermediate positions, the work will not be engaged by' the rapidly rotating bits. By drawing the handle 24 toward the handle 22 and holdingthem fixed relative to each other, the frame 23 will bind upon the work and hold it securely in the jig. The two handles are then used. for the purpose of rocking the jig and the work carried thereby; Beforethis is done, however, the pedal M is pressed downwardly at oneside, thereby-causing the work to feed against one of the rotating'bits. While it is thus located the work is'rocked back and forth with the result that an' arcuate slot is thus formed, said slot" being of the length permitted by the slot 2! in which the bits work. Thereafter, the other end of thepedal' depressed with the resultthat the work is fed against the other rapidly rotating bit. Said work is rocked as before and thus the hand hole having both sides rounded and properly finished is thus quickly completed. By bringing the parts to their intermediate positions, releasing the work and removing it, the machine is promptly prepared to receive another case end or the like to be acted on.

It has been found in practice that a machine such as herein described can be used effectively for producing hand holes at high speed so that production is thus greatly increased with a corresponding saving of time and labor.

What is claimed is:

l. A machine for producing hand holes in case ends, including a frame, coaxial opposed routing bits mounted thereon, the distance between the bits being greater than the thickness of the work to be cut, means for rotating the bits, a carriage slidably mounted on the frame between the bits for movement in a line with the axis of the bits, whereby to shift work carried thereby into engagement with either bit, a substantially vertically disposed lever positioned below the carriage, the lever being fulorumecl intermediate its ends to the frame, a yoke at the upper end of the lever proportioned to embrace and engage the carriage at opposed sides of the carriage, a foot pedal connected intermediate its ends to the lower end of the lever, whereby to swing the lever in either direction about its fulcrum point, a work holding jig tiltably mounted in the carriage and positioned normally to support the work between and out of contact with the respective bits, and means under the control of the operator for rocking the jig relative to'the carriage.

2. A machine for producing hand holes in case ends, including a frame, coaxial opposed routing bits mounted thereon, the distance between the bits being greater than the thickness of the work to be out, means for rotating the bits, a carriage slidably mounted on the frame between the bits for movement in a line with the axis of the bits, whereby to shift work carried thereby into engagement with either bit, a lever fulcrumed to the frame, one end of the lever being proportioned for engagement with the carriage, means under the control of an operator at the other end of the lever, for swinging the lever in either direction about its fulcrum point, a work holding jig tiltably mounted in the carriage and positioned normally to support the work between and out of contact with the respective bits, and means under the control of the operator for rocking the jig relative to the carriage, said means comprising a handle fixedly attached to one side of the jig, and a handle pivotally attached to the opposed side of the jig, for swinging movement into engagement with the first named handle, whereby said handles may additionally comprise means for clamping the work in the jig.

3. A machine for producing hand holes in case ends, including a frame, coaxial opposed routing bits mounted thereon, the distance between the bits being greater than the thickness of the Work to be cut, means for rotating the bits, parallel guide rods mounted on the frame in parallel relation to the axis of the bits, a carriage slidably mounted on the guide rods and between the bits, pedal means under the control of an operator for shifting the carriage along the guide rods, whereby to shift work supported by the carriage into engagement with either bit, a work holding jig pivotally mounted on the carriage for swingable movement in a vertical are perpendicular to the axis of the bits, and means under the control of the operator for swinging the jig relative to the carriage.

4. A machine for producing hand holes in case ends, including a frame, coaxial opposed routing bits mounted thereon, the distance between the bits being greater than the thickness of the work to be cut, means for rotating the bits, parallel guide rods mounted on the frame in parallel relation to the axis of the bits, a carriage slidably mounted on the guide rods and between the bits, pedal means under the control of an operator for shifting the carriage along the guide rods, whereby to shift work supported by the carriage into engagement with either bit, a work holding jig pivotally mounted on the carriage for swingable movement in a vertical are perpendicular to the axis of the bits, the jig comprising opposed side walls spaced apart to receive the work, the side walls having opposed arcuate bit-receiving slots concentric with the axis of movement of the jig, a handle fixedly attached to one of the side walls, a clamping frame pivotally connected to the opposed side wall, and a handle on the clamping frame, the latter handle being extended for positioning in close relation to the first named handle upon pivotal movement of the clamping frame, whereby to provide means under the control of'a hand of the operator for simultaneously clamping the work in the jig, and rocking the jig in the carriage.

5. A machine for producing hand holes in case ends, including a frame, coaxial opposed routing bits mounted thereon, the distance between the bits being greater than the thickness of the work to be cut, means for rotating the bits, parallel guide rods mounted on the frame below and parallel to the axis of the bits, a carriage extending between the guide rods and slidably mounted thereon, whereby to shift work carried by the carriage into engagement with either bit, a lever positioned below'the carriage, fulcrumed to the frame for swingable movement in a vertical arc, means at the upper end of the lever proportioned to embrace and engage the carriage, pedal means connected to the other end of the lever under the control of an operator, a work holding jig pivoted to the carriage for movement in a vertical are, opposed side Walls on the jig, a handle fixedly attached to one side Wall, a clamping frame pivoted to the other side wall, and a handle on the clamping frame positioned for engagement with the first named handle upon swinging of the clamping frame, the side walls of the jig having opposed arcuate slots formed therein proportioned to receive the respective bits.

ALVA CLAYBOURNE: COKER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 394,879 Phillips Dec. 18, 1888 485,162 Barthelmes NOV. 1, 1892 1,572,797 Hirt Feb. 9, 1926 2,380,750 Gove et al July 31, 1945

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