US2231140A

US2231140A - Core plug

Info

Publication number: US2231140A
Application number: US278797A
Authority: US
Inventors: Charles M Richardson
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-06-12
Filing date: 1939-06-12
Publication date: 1941-02-11
Anticipated expiration: 1958-02-11

Description

1941- c. M. RICHARDSON 2,231,140

CORE PLUG Filed June 12, 1959 INVENTOR ATTORNEYS Patented Feb. 11, 1941 UNITED STATES;

PATENT o-F-Flcs 1 Claim.

The present invention relates to new and improved core plugs or bushings for roll material.

Materials such as paper, when manufactured are wound on a core which core may be formed of wood, paper or other composition. .When said materials are to be converted into a finished prod uct, the core and material are connected with the converting machine by being placed on a shaft of said machine which extends through the core permitting the material to unwind as; it is fed into the machine. Quite frequently, the diameter of the core is greater than the diameter of the shaft of the converting machine'with the result that r the core does not rotate in unison with the shaft. When this occurs, there is a possibility of the core rotating faster than the shaft causing improper feeding of the material to the converting machine.

An important object of the invention is, therefore, to provide a core plug or bushing adapted to be placed on the shaft of a converting machine for uniting the same with the core and material supported thereon.

A'further object of the invention resides in the provision of novel means for locking the core plug or bushing in engagement with the shaft.

A still further object of the invention resides in the provision of a core plug or bushing having spirally formed threads thereon Which will bite into the material of which the core is formed as the core plug is placed over the shaft between the same and the core.

The invention will be fully and comprehensively understood from a consideration of the following detailed description when read in connection with the accompanying drawing which forms a part of the application.

In the drawing:

Figure 1 is essentially a vertical sectional view with parts in elevation illustrating the device in use.

Figure 2 is a side elevational view of the locking plug.

Figure 3 is a front end elevational view of the tapered core plug.

Figure 4 is a front elevational view of the lock ing plug, and

Figure 5 is a side elevational view illustrating the device in use.

Referring to the drawing for a more detailed description thereof,-there is disclosed a roll of paper or similar material 8 wound upon a core I, said core being formed of heavy fiber stock, wood or other composition. When the roll of material 6. is to be converted into a finished product, it is placed on a shaft 8. to be fed into a converting machine, the shaft 8 being generally smaller in diameter than the core 1.

The core plug generally designated by the reference numeral 9 is disposed over the shaft 8 on each. end thereof and is wedged between said shaft and the core I. The core plug 9 is formed with a central bore I 8 of a size to permit slipping said plug over the shaft 8 and bringing it up into position to screw into the core I. The core plug 9 maybe formed of iron or similar material being tapered inwardly indicated at H, and the exterior portion thereof formed with tapered spiral threads l2. As more clearly shown in Figure 1 of the drawing, the tapered portion of the plug on which the tapered spiral threads are formed begins with the inner portion of the collar l3 and extends toward the end of the plug.

A multiplicity of spaced openings 14 are formed circumferentially of the collar l3 for receiving a spanner wrench or the like used in applying the plug to the core. As aforeindicated one of the plugs 9 is disposed over each end of the shaft 8 and with the use of an appropriate tool is screwed inwardly between the shaft and the core with the threads l2 biting into the core I. It may be possible to tighten the plug sufiiciently for it to be substantially flush with the end of the roll or it may extend away from the'same as shown in Figure 1 of the drawing. The plug is tightened, however, until binding action is obtained whereupon the core 1 will be caused to rotate with the shaft 8 through the medium of the core plug 8.

Means is also provided for locking the core plug 9 on the shaft 8, the locking plug being generally designated by the reference numeral l5 and col prises a collar I6 and stem H, the stem I! being centrally bored as indicated at 8 so as to fit over the shaft 8. The collar 9 is counter-bored as indicated at l9 for receiving the stem ll, the counter-bore being slightly olf-set and substantially the length of said stem. The collar it is formed with spaced openings 20 for receiving a spanner Wrench or the like for rotating the locking plug into engagement with the core plug. As is to be understood, the stem I1 is machined with an ofiset corresponding to the counter-bore [9.

The face of the locking plug shown in Figure 4 of the drawing is formed with arcuate shaped slots 2| and 22 respectively, for receiving the cap screws 23, which screws fit into threaded openings 24 formed in the core plug 9. When the stem I1 is inserted into the counter-bore l9, cap

screws 23 will be placed through the slots 2| and 22 and partially threaded into the openings 24. This will serve to hold the members 9 and I5 loosely together so that both can be slipped onto the shaft at the same time and always remain together but can be turned independently within the range of the slots 2| and 22. As is to be understood, the location of the cap screws and range of the slots 2| and 22 will depend upon the distance required to rotate the locking plug for loosening it and the plug from the shaft.

If desired, an additional arcuate slot 25 may be formed in the collar with a slotted portion 26 formed in the periphery of the stem H, the slotted portion permitting a more binding effect between the stem and the counter-bore I9 when rotating the locking plug.

In the use of the device, after both the plug and the locking device attached thereto by the cap screws 23 have been slipped on the shaft 8, the plug 9 is screwed into the core with the use of a spanner wrench or the like applied to the openings M. Then by use of a spanner wrench applied to the openings 20 in the locking plug [5, the locking device will be rotated without the plug turning until the stem I! has moved the limit of the counter-bore I9 causing the plugs 9 and I5 to become looked through friction to the shaft 8.

As is to beunderstood, the plugs 9 and I5 will be manufactured in sets, one for each end of the core and will be formed with a right-hand and left-hand thread on one plug of each set. The plugs will be made of different sizes to accommodate their use with difierent sized cores and shafts.

Also it will be understood, of course, by those skilled in the art that variations in the hereinabove described device involving the substitution of substantial equivalents for the devices described are intended to be comprehended Within the spirit of the present invention and that the invention is capable of extended application and is not confined to the exact showing of the drawing nor to the precise construction described and, therefore, such changes and modifications may be made therein as do not affect the spirit of the invention nor exceed the scope thereof as expressed in the appended claim.

What is claimed is:

A device of the character described for securing paper rolls mounted on a core to a shaft,

- comprising, a plug having a central bore therethrough for disposing the same on a shaft between said core and said shaft, a collar formed integral with said plug, said plug being tapered and formed with an externally tapered thread for engagement with said core, said collar having an off-set counter-bore formed therein, a locking plug engageable on said shaft within said counter-bore, said locking plug being formed with a collar of substantially the same diameter as said first mentioned collar, said second mentioned collar having arcuate spaced slots formed therein, pins extending through said slots for loosely uniting said plugs, and means formed in said collars for effecting rotation of said plugs.

CHARLES M. RICHARDSON.