US1796534A - Automatic chuck for paper rolls - Google Patents

Description

March 17, 1931. T, T, POPE 1,796,534

` AUTOMATIC CHUCK FCR PAPER ROLLS Filed May 9, 1927 2 Sheets-Sheet 1 March 17, 1931. T, T, POPE AUTOMATIC CHUCK FOR PAPER ROLLS 2 sheets-sheet 2 Filed May 9, 1927 Patented Mar. 17, 1931 l UNITED Ysrres PATENT vori-"ic TURNERI T. POPE, OF HOUSTON, TEXAS, ASSIGNOR OF ONE-HALF T Gr. L. MIMS, OF

HOUSTON, TEXAS AUTOMATTC CHUCK FOR PAPER `ROLLS Application led. May 9, 1927. Serial N0. 189,846.

My invention relates to chucks for gripslightly different construction, but embodyping rolls of print paper and the like to the ing` the invention. I shafts of the press upon which the paper is ALike numerals are employed to designate used. y like parts in all the views.

The chucks employed in securing rolls of In Fig. l the roll of paper l is shown as 55- paper to the supporting shafts upon the press, mounted upon a shaft 2 supported in the must be loosened andV removed each time a frame 3 of the press. At one end, the shaft new roll is mounted onl the shaft for use. projects beyond the frame and has thereon rlhe chucks now most commonly employed tension device in the nature of a brake. It

are objectionable from the fact that they comprises a grooved drum 4 keyed to the Go come loose easily when in use and allow slipshaft. Fitting about the drum is a clamping page of the roll on the shaft and cause Iinjury band 5 made up of two semi-circular memto the core of the roll. Furthermore, the bers hinged at 6 to a threaded pin 7. The upgripping means engages so large a portion of per ends of the members are equipped with i i5 the` paper on the core that it is impossible to a tension screw 8 by means of Which the prese5 unreel all" of the paper due to the grip of the Suf@ 0f the band may be adjusted upon the chuck on the paper. A large quantity of drum in an obvious manner. The pin 7 is paper is thus Wasted at the center of each roll. IOttoh'le through a hand Wheel 9 to adjust It is an object of my invention toy provide a the position of tlie drum relative to the frame i chuck which is easily and quickly installed or 0f the plGSS- 70 removed, and which is capable of automatic .The 1011 Of paper l has an inner core l0, ortightening on the shaft, When desired, by the dinarily made of pasteboard, or some similar adjustment of the tension upon the web of Composltlon, Said. core being cylindrical in paper leaving the roll y shape and furnishing a spool upon Which the n 42li It is a lfurther object to provide a chuck of Web of paper is Wound. The ends of the core 75 the character stated which does not engage hmfe 01 Cl11&l1y il SlOt 0l1 recess 1l therein,

and niutilate mor-e than a comparatively WhlCh 1S adapted t0 leCelVo Some means small portion of the roll of paper. mounted on the shaft to hold the coreagainst It is desired that the chuck be capable of OlOIl OD the Shaft- 30- ready adjustment for different lengths of T0 hOld the COI@ and She T011 rmly UPOH 80 rolls of paper and be automatically latched the Shaft'l PFOPQT adjusted Position I em in p lace on the shaft Where desired. P1057 a .ChllCk at each Sud 0f the 50H adapted Other objects of the invention residing in t0 mi Wlthm the Golfe and glP the Sam@- he the particular constructionV and arrangement COHSI'UCOH 0f ths ChUPk mchlds an 1111161' of the parts will be apparent from the more mandfel 01" Slew? 12 Whlcll fits Shdably upon 85 detailed description which follows. )Phe Shaft 2 and 1S approxlmately Cyllldllal Referring'to the drawings herewith Fig l in shape. It has its outer end formed with is a broken side view of a roll of paper mounta mdml flange 13, thereon sgld flange havmg ed upon a Shaft in the press, and employing means thereon through which the mandrel my invention. Fig. 2 is an end View of the piynbe lined to the shaft in any desired po- 9o Same' Fig 3 is a Central Virtcfl1-sect0il I contemplate the provision of means to through a T011 of Papin Shqwmg it -m pos1` automatically lock the mandrel upon the tion upon a shaft, my invention being shovvn Y s. shaft. In Figs. l to 6 inclusive, the shaft 2 45 both'm Sectlon and 1n elevatlon- Flg- 4 1S a is provided with a keyvvay therein, the lovver 95 VleW 0f he Chuck mandrel, de tached .Partly side of which has teeth 14E inclined from the 1n lelfatlol and Partly 1n Secton- Flg- 5 1S ends toward the middle point of the shaft. a slmller vlevv of the chuck Sleeve. Fig. 6 The mandrel hasashort key 27 thereon fitting is a transverse section on the plane 6-6 of into said keyway suiliciently to prevent rota- Fig, 5g Fig., 7 is a section of a .Clerck et tion of said mandrel. on said, shaft. 10o

At the outer side of the flange 13 is a recess 28 in which is pivoted a pawl 2) having finger 30 engaging said teeth so to automatically hold said mandrel in locked position.

In Fig. 7 the locking means is modified. In this case there is formed on the inner side of the mandrel a keyway 21 adapted to receive a key 22 in the shaft. This serves to prevent relative rotation of the mandrel on the shaft. rlhe key is formed on its outer face adjacent the mandrel with ratchet teech 23 inclined inwardly toward the middle of the shaft. To engage with these ratchet teeth a pawl Q-/l is mounted upon the outer end of the mandrel, said pawl having a` linger 2.3 adapted to eng1 with the teeth Q3 of the key and held rcsiliently in that position by means of a spring QG. Thus, when the mandrel is forced inwardly on the shaft to engage the core, the ratchet will cou-act with the teeth 23 upon the key to prevent its movement outwardly. lllhen the chuck is to be again removed from the roll, the pawl released from the ratchet upon the key by a force exerted upon the upper arm of the pawl in an obvious manner. The mandrel also has at an approximately central position thereon a plurality of spaced pins or lugs 15, extending radially from the aandrel. Said pins are welded to the mandrel after the outer sleeve 16 has been placed in proper position.

rlhe mandrel forms seat for chuck sleeve 1G which fits slidably on the outer eyindrieal surface of the mandrel. Said sleeve is tay ered from its outer end inwardly and is adapted to be wedged between the mandrel and the inner surface of the core 10. T he outer end of the chuck sleeve has a radially extending head 17 which is adapted to contact with the flange 13 upon tbe mandrel. rl`he inner side of the head 17 has a sharpened ange 18 thereon which extends inwardly a short distance and adapted to engage about the outer side of the core l() so as to prevent its undue expansion, due to the gripping of the chuck therein. l have formed the gripping edge 18 sli ghtly larger than the core so as to also engage a few windings of the paper upon the roll, thereby obtaining a firm grip thereon. A key 2O is formed on the sleeve to lit within the slotted opening 11 in the core.

rlhe chu k sleeve 16 has a plurality of openings 19 therein to receive the pins 15 on the mandrel. These openings 19 are inclined in a spiral direction upon the mandrel and the pins 15 fit therein and the sides of the slots or openings provide cam surfaces upon which the pins may slide. Then the chuck sleeve is rotated relative to the mandrel in a forward direction, the pin bearing against the side of the slot tends to force the chuck sleeve inwardly against the roll so as to form a more rigid engagement therewith.

ln the operation of my device, one of the chucks at one end of the roll is ordinarily set rigidly upon the shaft and is not removed when a new roll is mounted thereon. The opposite chuck is removed, allowing the placing of a new roll of paper upon the shaft and is inserted into position in the end of the roll with the key 20 fitting within the slot or recess 11 in the core, and when the chuck has been forced firmly into position, the mandrel will automatically engage and be latched to the shaft. Vith reference to Fig. 2, it will be noted that the tension upon the shaft may be varied by the use of the tension screw 8. lWhen the web of paper is being unwound from the roll the pins 15 upon the mandrel will be in the forward side of the slotted openings 19 in the chuck sleeve. lf, however, the roll chuck is to be tightened within the core, the tension upon the shaft is increased to slow down the rotation of the shaft and the pull of the web of paper upon the roll will tend to rotate the roll relative to the shaft so as to draw the pins toward the rearward side of the slot and force the chuck sleeve inwardly so as to grip the roll more firmly. This action, as will be noted, is responsive to the tightening of the tension screw S at any time so as to assure a firm grip upon the roll.

The advantages of my construction lie in its simple and positive action and the ease with which it may be adjusted to grip the roll. It has a further advantage in that very little of the paper upon the roll will be wasted, due to the action of the chuck. The use of two adjustable chucks, one at each end of the roll, prevents liability of slipping and breaking of the core.

Having thus described the invention, what I claim as new and desired to protect by Letters Patent is:

1. In a press, a shaft, a paper roll thereon having a cylindrical core slotted at its ends, a mandrel on said shaft adapted to lit loosely within the end of said core, a chuck sleeve on said mandrel fitting tightly within said core, a key thereon engaging in said slotted core, a flange on said sleeve having a sharp forwardly extending edge adapted to cut in to said roll, means to tighten said sleeve in said core, and means to fiX said mandrel to said shaft.

2. In a press, a shaft, a paper roll thereon, a core in said roll, a mandrel on said shaft within said core, a tapered chuck sleeve on said mandrel, an inwardly extending flange on the periphery of said chuck sleeve to engage about the end of said core, and means connecting said mandrel and sleeve, and responsive to tension on said roll, to tighten said chuck upon the end of said core.

3. In a press, a shaft, a paper roll thereon, a core in said roll, a mandrel. on said shaft Within said core, a tapered chuck sleeve on said mandrel, an inwardly extending flange on the periphery of said chuck sleeve to engage about the end of said core, and a radial pin on said mandrel, engaging in a cam slot 1n said sleeve and arranged to force said sleeve toward said roll when said sleeve is rotated slightly relative to said mandrel.

4. In a press shaft, a paper roll thereon having a cylindrical core slotted at its ends, a mandrel on said shaft adapted to fit loosely Within the end of said core, a chuck sleeve slidable on said mandrel and tting tightly Within said core, a key thereon engaging in said slotted core, means securing said sleeve to said mandrel, means to fix said mandrel to said shaft, a flange on said chuck sleeve, and means on said flange to enter the Windings of paper adj aeent said core.

In testimony whereof I hereunto aHiX my signature this 5th day of May, A. D. 1927.

TURNER T. POPE.

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