US2443243A - Paper roll shaft - Google Patents

Description

June 15, 1948, W. A. HAYSSEN PAPER ROLL SHAFT Filed Feb. 9, 1945 Im/ENTOR.

HTTO/EWEMS.

.package wrapping Patented June l5, 1948 EAPER RGLL SHAFT William A. Hayssen,

to Hayssen Manufacturing Company,

Sheboygan, Wis., .assignor Sheboygan, Wis., a `copartnership Application February 9, 1945, Serial No. 576,984

3 Claims. l

This invention relates to improvements in paper roll shafts.

Package wrapping machines customarily have incorporated therein revoluble shafts or arbors on which rolls of wrapping material or paper are mounted and from whence the paper is unwound in web formation to be wrapped about packages passing through the machines. In a conventional structure both ends of a paper roll shaft are mounted on the machine in frame-carried bearings or supports. As empty paper roll cores must be removedfrom a shaft periodically and be replaced by a new paper roll, it is necessary that some means be provided for permitting the removal of the shaft from its mountings vor permitting the disengagement of one end of the shaft from its support to permit the axial movement'for replacement purposes of the-exhausted paper roll core and the new paper roll. Itis also desirable in connection with the paper roll shaft of a package 'wrapping machine that means be provided for restraining or regulating the freedom of rotation of the shaft so that the wrapping material willnot unwind therefrom too freely.

With the foregoing in mind, it is a primary object of the present invention to provide, for a machine, a paper roll shaft mounted in the machine at only one end of the ,shaft whereby the other end of the shaft is at all times A`free of obstructions and connections .permitting the free axial movement along the shaft in the direction of the free end thereof of paper roll cores and paper rolls, whereby replacements on lthe shaft may be accomplished easily and rapidly without disengaging any portion of the shaft relative to its mounting means.

A'further object of the invention is to provide a paper roll shaftprovided with manually operated 'adjustable means for quickly releasably engaging the core of a paper roll to removably clamp the paper roll on the shaft for revoluble movement withthe-shaft.

A further-object of the invention is to provide a 'paper roll shaft having manually adjustable brake means for variably restraining free rotation of the shaft.

VA further object of the invention is lto provide va 4paper roll shaft readily applicable to conventional package wrapping-machines and requiring 'a minimum. of fixtures in connection with the shaft mounting.

A further object of the inventionis to provide a ypaper `roll shaft which is of very simple-construction, is inexpensive to manufacture, which lpermits the'easy replacement of paperv rolls, which same-with' an inner surface is `manually adjustable While mounted 4on a ma- While carrying a paper roll, which is strong and durable and-efficient in operation, and which is well adapted for the purposes described.

`With the above and `other objects in View, the invention consists of the improved paper roll shaft and its parts and:combina-tions as set forth in the claims.

In the accompanying drawing in which the same reference characters indicate the same parts in all of the views:

Fig. 1 is a longitudinal 4sectional view of the improved 'paper rollshaft Vshown Amounted in lthe chine and frame `portion vof a package wrapping machine and having a paper roll applied thereto, a fragmentary portion ,of thelatter being shown in section;

lFig. 2 is a cross sectional view taken online 2 2 of Fig. land on a-larger scale;

Fig. 3 is a cross sectional view taken on line fil-3 of Fig. l and on a larger scale; and

Fig. 4 is a cross lsectional view taken on line li--rlnf Fig. land on `a larger scale and with other portions broken away .and in section to show structural details.

Referring now more particularly to thedrawing, it .will appear that a portion of the frame of a package wrapping machine `or the like is indicated by lthe numeral 8, said machine portion having a transverse bore 9 in which the end portion of an inner shaft member or core lll has a force t so that in the mounted condition, the inner shaft member-lll remains stationary.

A portion of the stationary shaft -Il extending from an intermediate point toward the Ymachine frame 8 is surrounded by a sleeve il which is free to rotate on the center shaft Iii. At its outer end-the sleeve H is enlarged and flanged to form a cup H whose open end abuts a face of the machine frame'8. Lodged within the cup Il' and surrounding the center shaft lil are segment shaped 'brake shoes l2. 'Each brake shoe is formed with an internal radially directed cylindrical recess I3 which houses in its lower end a plungerl'll having a tapered or conical inner end portion it. VThe upper end portion of each plunger It resiliently `engages a confined coiled spring 15 and each spring l5 has its other end impinging against the shoulder formed at the -outer end of its bore I3. Thus, outward movement of a plunger IA `will apply, through the spring l5, yielding outward pressure on the engaged brake shoe l2 to frictionally contact the portion of the cup l l of the sleeve l l.

As will be apparent, the brake shoes I2 are intended to be adjusted in respect to their yielding frictional engagement with the cup II in a manner so as to exert a desired restraint or braking action on the rotation of the sleeve II and parts carried thereby. The supported end of the center shaft IE! has an axial bore I3, a portion of which is threaded and which is engaged by a threaded adjusting screw I 1 whose projecting outer end portion is enlarged and knurled, as at I8, for manual manipulation. The shank of the adjusting screw I1, inwardly of its threaded portion, is reduced and its extremity is tapered or conical, as at I 9. The tapered surface I9 of the adjusting screw I1 is in adjustable contact with the tapered extremities I4 of' all of the, brake shoe plungers I4. Thus, when the adjust-vr ing screw I1 is turned inwardly, its tapered extremity I9 will ride on the tapered extremities I4Y of vtheY plungers t4 to project the plungers outwardly and thereby cause the brake shoes I2 to apply greater frictional restraint on the cup Ilrofthe sleeve II. When the adjusting screw I1 is turned Yin the opposite direction or outwardly, its contact with the tapered ends of the plungers I4 is such that the springs I5 are permitted to urge the plungers inwardly' to relieveY outward pressure on the brake shoes andV to thereby reduce the frictional restraint imposed by the brake shoes.

,The sleeve I I is rotatably held in its assembled relation on the center'shaft I0 and against axial separation by an end disc-2i) of greater diameter thanthe center shaft which is secured to theV inner end of the center shaft bya screw 2|. Peripheral portions of the disc 2G impinge against the innerendof the sleeve II. i

An elongated outer tubular member 22 forms the outer or enclosing shell of the assembly. The outer tubular member 22 has a force t with the sleeve II so as to form therewith a unit which will rotate on the center shaft Il).A

Intermediate its ends and commencing inwardly of the inner end of the sleeve II, the

' outer tubular member is provided with elongated spaced apart slots 23. In Veach of said slots there is radially adjustably positioned a core clampingmbar 24. Each bar 24 has its opposite extremities `outwardly'inclined, as at 24'. Within thebore of the outer tubular member 22 and spaced apart a distance less than the length of a clamping bar 24 are a pair of slidafble supporting discs 25. The diameter of the discs are slightly less than the internal diameter of the outer tubular member 22, and each disc is provided wth a central bore threaded to engage the threaded shank portions 26 and 26 of an elongated axial screw rod 21. Peripheral portions of the supporting idiscs 25 are formed with spaced apart tapered slots 28 to slidably receive the tapered extremities 24' of the clamping bars 24. The clamping bars 24 are yieldingly held inV their assembled relationship relative to the supporting discs 25 and are yieldingly joined together .by circularly arranged coiled springs 29 which vencircle the axial screw rod 21 and pass through apertures 30 therefor in the clamping bars;

The outer orfree end of the tubular member 22 is closedby a head 3| secured thereto and formed with an axial bore 33 through which the outer endof the screw rod 21 revolubly extends.

A portion of thescrew rod 21, adjacent the inner face of the head 3l, has affixed theretor a collar 34. Abutting the outer end of the head 3| and secured to an extended portion of the screw rod 21 is a knurled operating handle 35.

As has been mentioned, the improved shaft is adapted for mounting in a frame portion of a package Wrapping machine and is designed to replaceably carry rolls of wrapping material or paper which usually comprises a central tubular core 36 with a supply ofk paper or wrapping material 31 wound thereon. It is intended that the paper 31 be unwound from the core 35 in web formation to pass into the Wrapping machine for severance into desired lengths wherein it is wrapped about packages advancing through the machine. The internal diameter of the paper roll core 36'is slightly greater than the external diameter of the outer tubular member 22 of the shaft assembly to permit axial movement of the paper roll Vrelative to the shaft for positioning the roll on the shaft and for removal and replacement purposes.

In the present improvements, as distinguished from conventional practices, the shaft assembly is supported in the machine frame at only one end of the shaft, thereby leaving the opposite end of the shaft for-med with the handle 35 entirely free .ing an empty paper Vrollcore from the shaft assembly or prior to inserting a fresh paper roll on the shaft, the clamping bars 24 should be retracted so as to be in non-protruding positions relative to the outer surface of the tubular member 22. This is accomplished by turning the handle 35 in a direction so that the supporting discs or travelling nuts 25will be moved away from each other and in directions toward the ends of the tubular member 22. Such movement of the disc 25 through the screw shaft 21 retracts the clamping bars 24 as the same are then permitted, because of their inclined ends 24', to ride downwardly in the inclined slots 28 of the disc 25. i Obviously, retraction of the clamping bars 24 a sufficient distance will then release the paper roll core 26 to permit'its axial movement along the junction with the inclined Surfaces 2li and 28,`

shaft assembly and its removal therefrom, this movement being toward the right in Fig. 1.l The empty paper roll core is replaced by a fresh roll of paper in a reverse manner, and when the new roll of paper is in position on the shaft assembly, the handle 35 is turned in a direction to operate the screw rod 21 so as to draw the supporting discs 25 toward each other. Such action, in conwill cause outward radial projection of the clamping bars 2e, and when said bars are projected sufficiently far beyond the outer surface of the tubular member 22, their outer edges will impinge against inner surface portions of the core 36 to clamp it in position and to hold it to the revoluble 'sleeve portions of the shaft assembly. In a. package wrapping machine with a web of paper extended from the roll, power is applied to the web to unroll it as desired `from the shaft assembly. In the present improvements the center shaft member I llis held stationary, but the sleeve members II and 22, with the roll being clamped to the Y latter, are free to turn. As previously mentioned,

it is desirable that the freedom of revoluble movement of the shaft sleeve be regulatable and to that end the brake shoes I2, previously described, may be adjusted, to vary as desired the frictional restraint placed on the revoluble portions of the shaft assembly.

The adjustment of the shaft brake, as well as the manipulation and adjustment of the paper roll core clamping bars, is accomplished manually through the accessible handles IS and 35, fboth of which are readily manipulatable with the shaft in its mounted position` and carrying a paper roll. The mounting of the improved paper roll shaft is extremely simple and a minimum of connections are required as between the shaft and the frame of a machine. Stoppage of a package wrapping machine equipped with` the improved paper roll shaft is minimized as to time because of the facility with which `paper roll replacements may be made, and such replacements are easily made without disturbing the mounting of the shaft relative to the machine frame. The improved paper roll shaft is furthermore of simple and inexpensive construction, is easily manipulated, and is well adapted for the purposes set forth.

What is claimed as the invention is:

1. A shaft construction, comprising an inner core, a sleeve and tube unit `revolubly surrounding a portion of said core, said core extending axially beyond one end of the sleeve and tube unit for anchorage in a supporting frame, a brake interposed between portions of the core and sleeve and tube unit and housed by the latter, and manually operable expansiible means associated with -another internal portion of the sleeve and tube unit for releasable engagement with a material roll carried by the sleeve and tube unit, said sleeve and tube unit providing the housing and support for both the brake and the expansible means.

2. A shaft construction, comprising an inner core, a sleeve and tube unit revolubly surrounding a portion of said core, said core extending axially beyond one end of the sleeve and tube unit for anchorage in a supporting frame, brake shoes interposed between portions of the core and sleeve and tube unit and housed by the latter, manually actuated brake adjusting means mounted in the core and engaging the brake shoes and extending externally of the core, ex-

pansibe means housed Within another portion of y the sleeve and tube unit for releasable engagement with a material roll carried by the sleeve and tube unit, and a manual operating member extending axially of the sleeve and tube unit for controlling said expansible means.

3. In combination, a supporting frame, a stud shaft having one end fixedly mounted in said frame and extending laterally thereof, a sleeve and tube unit revolubly mounted on the extended portion of said stud shaft and projecting therebeyond, the outer end of the sleeve and tube unit being free and a portion of the sleeve and tube unit surrounding the stud shaft being formed with a cupped enlargement, brake shoes within said cupped enlargement, means yieldingly anchoring the brake shoes to the stud shaft, manually operable means extending axially into the stud shaft and engageable with said shoe anchoring means for varying the frictional engagement between the shoes and said cupped enlargement, the outwardly extended portion of the sleeve and tube unit having spaced longitudinal slots therein, clamping bars movably engaging said slots, means within the sleeve and tube unit yieldingly connecting said bars, shiftable discs within said sleeve supporting said bars, contacting portions of the bars and discs being formed with cooperating cam surfaces, and an operating rod disposed axially within said sleeve and tube unit and in screw threaded engagement with said discs, the rod extending beyond the free end of the sleeve and tube unit and turning movement of the rod being effective to shift the discs and project or retract the clamping bars in their slots and relative to the outer surface of the sleeve and tube unit for clamping or releasing a material roll mounted on the sleeve and tube unit, said sleeve and tube unit forming a closing housing for the major portion of the stud shaft, the brake shoes, the brake shoe operating means, the clamping bars, the shiftable discs, and the operating rod.

WILLIAM A. HAYSSEN.

REFERENCES CITED UNITED STATES PATENTS Number Name Date 1,409,504 Wheildon Mar. 14, 1922 1,673,444 Derry June 12, 1928 1,908,562 Schaffer et al May 9, 1933 1,955,762 Saltzrnan Apr. 24, 1934 2,097,287 McKenna Oct. 26, 1937 2,199,603 Ackley May '7, 1940 2,266,408 Bruestle Dec. 16, 1941 FOREIGN PATENTS Number Country Date 26,037 Great Britain 1908 274,808 Great Britain Dec. 8, 1927

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