US1648399A

US1648399A - Core tip

Info

Publication number: US1648399A
Application number: US62096A
Authority: US
Inventors: Earl M Hill
Original assignee: Consolidated Water Power and Paper Co
Current assignee: Consolidated Water Power and Paper Co
Priority date: 1925-10-12
Filing date: 1925-10-12
Publication date: 1927-11-08
Anticipated expiration: 1944-11-08

Description

Nov. 8, 1927. 1,648,399

E. M. HILL CORE TIP Filed QQ'L 12, 1925 fire. 4

I x t l Eatented Nov. 8, 1927.

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" CORE 'rIr.

Application filed October 12; 1925'. s lserial I\l'o. 6 2,096.f

- 'This: invention relates. to core for winding cores of rolls of paper, such as commonly used in newspaper printing. I

--Numerous-"eflorts have been'made to. pro tectithe ends ofthe tubular'core, which is usually formed of paperrolled and pasted together. "hfetal tips havebeen suggested winding and unwinding operations.

for this purpose havingthe: keyway formed therein in various manners to avoid the wearingfof the core by the engagement of the driving dog therewith both during Ithe e cores are used repeatedly and protection of this sort'is essential. Protection must also be afforded against the spreading of the ends of the tubular core by the use of pry bars insert-ed therein for moving the very heavy roll' of paper wound thereon and such pro tecting tip should be devoid of shoulders on the inside that might be engaged by a. shaft or bar passing through the core, and devoid of shoulders on the outside to not interfere with the paper wound on the core. In most instances the metal core tips have required the paper core to be materially weakened by having its ends trimmed to receive the metal tip and by reason of openings formed therein to take rivets, screws and the like.

It is an object of the present'invention to avoid the weakening of the core in this manner by providing a substantial core tip with flaring flanges capable of being forced onto the end of the core and compressing the core material between them to efl'ect a tight joint making other fastening means unnecessary and sufficiently embedding the flanges-in the core material to cause them to lie substantially flush with the inner and outer surfaces of the core.

Another object of the invention is to produce the keyway in such a core tip that will have its edges re-enforced or braced by hemming or turning the edges of the metal at the opening without materially reducing the thickness of the metal as when the core seat is formed by indenting without cutting the metal.

With the above and other objects in view the invention consists in the core tip as here- I Fig. 1 is annend viewof acoretip constructedin accordance with this invention;

Fig. 2 1s. a sectionalv on the endof a' core tube Fig. 3 is a similar -sectionalpview on a plane at right angles to the sectionalplane of Fig. 2, and

In these'draw'ings, 10 indicates the usual core tube having its end compressed between the inner; and outer concentric annular iew thereof in plac flanges 11=and 12 or thecoretip, which are joined by the ring 13. The ring and flanges are" integral, being preferably formed up from. a disk of cold rolled 'steel" in a manner that is well known in the art.

' The distance between the parallel flanges 1'1 and 512 f-OH'IBWhELfi less than the thickness of the core tube and the edgesof said flanges are formed flaring so as to compress the core. tube material between them when the core tip' is forced thereon with great pressure. The strength of the core tube material is thus not reduced at the junction with the core tip and still; by reason of the flanges terminating iniknife edges ld they torm a close oint therewith free from ob-v jectionable shoulders either on' the interior or the exterior of the core. This method of attaching the core tip to the end of the core avoids the necessity for rivets or screws or other attaching means that would weaken the joint.

The usual notch or key seat 15 is formed in the edge of the core tube and the core tip is cutaway at the inner flange 11 and the connecting ring 13 to give access thereto and to avoid the key engagement with the raw edge of the cut metal such edges 16 of the opening are turned inwardly, as best seen in Fig. 2. The rounded edges of the key opening in the'inetal tip not only facilitate'the engagement of the key in its key seat formed thereby, but afford a strengthening re-enor distortion as the result of pressure thereon by the driving key. Inasmuch as the opening is' cut in the metal before the edges are turned, such edges are not drawn to materially reduce their thickness and they are consequently stronger and better able to resist tearing and distortion by the key than if the keyway were produced by merely indenting without cutting the metal so as to form a key pocket. 7

Thekey opening cut in the metal core tip having its edges re-enforced by being turned into the key seat of the core tube without Stretching affords a stronger and more durable key-engaging surface and insures a longer life for the core tube.

The metal core tip completely filled with the compressed core material is not likely to be expanded and distorted by the centering cones fitting thereinand altogether the tubular core equipped with the core tips asdescribed is better adapt-ed for, long continued use without the development of defects common to other devices of this character.

i What I claim as new and desire to secure by Letters Patent is:

1. A core tube having a metal core tip, the latter being provided with concentric inner and outer integralflanges with their edges flaring and terminating in. cylindrical surfaces and having the edge of the core tube forced therein and compressed thereby whereby the core tip is permanently secured to thecore tube with the cylindrical surfaces of the flanges flush with the inner and outer walls of the core tube.

2. A core tube having a metal core tip, the latter being provided with concentric inner and outer integral flanges having their edges flaring and terminatingin rigid knife edges core tube, the end of the core tube being compressed between the flanges.

- flush with the inner and outer surface of the 3. A metal coretip for core tubes comhaving their edges flaring and forming rigid knife edges, the end of the core tube being compressed within the core tip with the knife edges of the flanges flush therewith, there being a key seat notch in the edge of the core tube and a corresponding opening cut in the end ring and the inner flange of the metal core tip, the edges of said opening being bent inwardly within the notch to form a key seat, such bent edges of the opening serving to prevent splitting or distortion of the metal around the key seat.

In testimony whereof, I alfix my signature.

EARL M. HILL.