US1838011A - Mandrel de-corer - Google Patents

Description

'Dea 22, 1931. G, 5T PETER 1,838,011

MANDREL DECURER Filed May 4, 1951 3 Sheets-Sheet 1 hi L; @woe nto@ bww 6207?@ LS'jPeZer a@ f f Y@ Dec. 22, 1931. Q sTi PETER 1,838,011

MANDREL DECORER Patented Dec. 22, 1931 UNITED STATES GEORGE sT. PETER, or BANGOR, ivrAlNiiiv MANDREL IDE-COREE Application led May 4, 1931.

The invention relates to a machine for removing remnants or cores of newsprint or other paper from mandrels upon which rolls of such paper are handled by printing presses or other machines. The paper at the centers of the rolls, is not useable in the machines and must be removed before theinandrels can again be used, and at present, slow, laborious and dangerous hand-operations are employed tovcut the cores of paper from themandrels. My invention however, aims to provide a rapid and eiiicient machine for removing the cores, without danger to the operator. With the above object in view, the invention resides in the novel subject matter hereH inafter described and claimed, description being accomplished by reference to the accompanying drawings. y no Fig. 1 is a. perspective view of machine t' constructed in accordance with the invention.

Fig. 2 is a fragmentary side elevation partly broken away and in section.

Fig. 3 is a horizontal sectional LView on y line 3 3 of Fig. 2. e D Fig. 4 is a vertical transverse sectional view on line 4 4 of Fig. 2.

Fig. 5 is a fragmentary vertical section on line 5 5 of`Fig.-4.` 1

Fig. 6 is a side elevation of the knife-carrying carriage and associated parts, and this view illustrates the manner in which the machine cuts the paper core when the carriage is moved in one direction. y Fig. 7 is an enlarged fragmentary elevation partly in section, showing the manner in which the remaining layers of the paper core are cut when the carriage is moved in `tlieopposite direction.

Fig. 8 is a detail sectional view on line 8 8 of Fig. 7'. n, `f

9 and 10 are Ahorizontal sectional views on lines 9 9 and 10 10 of Fig. 7. n' A. preferred construction has been `illustrated and will be specifically described,with the understanding however that within the scope of the invention as claimed, variations may be made.

The frame strcture F of the machine emv bodies two end frames E which are substantial duplicates. Each of these end members Serial No. 535,001.

connected by a transverse bar 14 carrying a f support 15 for an electric motor 16 which is used for. propelling the knife-carrying carriage 17 in either direction. This carriage is slidable along a horizontal guideway preferably consisting of parallel rods 18 extending between theupper ends of the standards 12 and rigidly secured to the latter.' A horizontal feed screw 19 is provided for the carriage 17, said screw having a threaded engagement with said carriage and having its ends rotatably mounted upon the standards 12. At one of its ends,the feed screw 19 is provided with a reverse gear 2O controlled by a lever 21 or in some other preferred manner,

for driving the screw 19 in either direction. -f

A vertical shaft 22 is provided to drive the reverse gear 20, said shaft 22 being driven by the motor 16, thro-ugh the instrumentality of appropriate gearing 23. 24 merely denotes a bearing bracket for the shaft 22, said;

by means of a hand screw 26, the lower end of said slide being-provided with one knife 27 which cuts through the greater part of the mandrel-carried paper core 28, when the carriage 17 m'oves in one direction, said carriage also having another knife 29 whichcuts through the remaining layers of the core upon the return movement of the carriage,

leaving the mandrel 30 free of paper. rlhe action of the knives 27 and 29 is illustrated more particularly in Figs. 1, 6 and 7 and will be hereinafter more definitely explained.

In the present showing, the lower end of the slide 25 is provided with a kerf 31 vin which the upper portions of both knives 27 and 29 are received, but.l separate recesses could'of course be provided for saidA knives. The knife 27 is of substantially L-shape and is provided with a cutting edge 32 inclined throughout its length away from the knife 29.

The vertical portion of'this blade 27 Vis. i,

extending across the kerf 31, said slot also receiving a fastener 35 extending across said kerf. When this fastener is tightened, the kerf 31 is transversely narrowed and hence the knife 27 is tightly clamped in place, and the key 34 merely prevents said knife from rocking about the fastener 35.

The blader`29 is verticallyelongated and 'is provided with a vertical cutting edge 36 facing away from the knife 27. This knife 29 is provided with a blunt-lowerfend 37 and with an acute angular nose 38 at the juncture of the edges'36 and 37. The upper end ofthe knife 29 is formed with a verticalV slot 39 throughwhich a pivot 40 passes, said 'pivot being carried by the slide ,25, Knife 29 projects some distance above the pivot 40 `and is received in the lower end of a coiled compression spring ;41,which is seated in aA notch 42 in the Yslide 25, the upper end of said notch being provided with a stud 43 or equivalent means for holding the upper end of the spring in place. The knife 29 may swing away from Vthe cutter 27, without limit during the operation of the machine, vbut its swinging movement toward said knife 27 is limited by a stop pin 44 which is carried by the slide 25 Vand vextends across the kerf 31.

lVhen the carriage 17 is traveling in the direction indicated by the tarrows A of Figs. 1 and 6, the knife 27 cuts through the greater part of the thickness of the paper corer28, the knife 29 then trailing idly in fan` outwardly swung position.l as clearlyshown in Figs. 1 and 6. When the carriage 17 is reversed however, thelknife 29 (immediately swings inwardly to the extent allowed by the pin 44, with the result that saidknife 29 then occup'iesran operative position (Fig. 7) so that it willcut the remaining layers of paper from the mandrel during the return movement of the carriage. During its operation, the knife 29 slides at its lower end 87, along the mandrel 30 and if any irregulari- .ties in this mandrel necessitate that lthe -knife shall move vertically, such movement -is allowed by the spring 41, said spring always serving to holdthe knife tightly down against the mandrel. By employing the two knives 27 and 29 operating in or substantially in the manner shownand described, the paper maybemuch more cleanly cut from the mandrel than when attempting to use only one knife to .completely cut through the core, for if a knife such as 27 for instance, were used, in order to adjust saidknife so thatits lieelwould cut entirely through the core, there would `be' danger Vef said heel dragging uponsaidcore and hence seriously dulling the `knife Aso that-said heel would tea-r the ypaper instead of cuttingrit and would soon become so obstructed as to be utterly inefficient. There is no such danger however,

5 with the 'knife 29, for only'its blunt edge 37 `Aengages the mandrel 80. f

To support the mandrel 30, I provide two centering plugs for reception in the ends of said mandrel, one of these plugs being shown at 45 in Fig. 1 while the other is illustrated at 46 in Figs. 2 and 3; One of these plugs is provided with a. suitable lug or the like 47 receivable in a mandrel notch, to hold the mandrel against rotation. Both plugs 45 and 46 are provided with carrying shanks such as 48 (Figs. 1 and 3). v The shank 48 of the plug 46 is secured to a slide 49 which may be adjusted to various positions along two horizontal guide rods 50 which extend between the end frames E, the ends of said rods being suitably secured to horizontal angle iron bars 51 which cross the standards 12 and are adjustably connected with the latter. The shank of the plug 45 passes through a vertical slot 52 in the standard 12 remote from the carri-age 49 and is secured to the adjacent bar 51. By vertically adjusting the bars 51, the `mandrel supporting means may be so positioned that the surface -of the mandrel will be absolutely parallel with the carriage guides 18, so that the knives 27 and 29 may operate in proper relation with said mandrel. By moving the slide 49 away-from the plug 45, a mandrel whose core has been cut, may be easily removed from the machine, and to insert another mandrel, one end of the latteris 'engaged with the plug 45 and the slide 49 is then slidfalon-gthe rods 50 until its plug 46 is properly engaged with the other end of said mandrel. If desired, suitable locking means may be employed for locking the slide 49 in any position to which it has been adjusted;

For securing the bars 51 to the standards 12 and allowingr vertical adjustment of said bars, I have shown bolts 53 passing through openings in said bars and through slots 54 in said standards. Jack screws 55 are preferably mounted under these bars 51 to allow easy and accurate vertical adjustment of them when the bolts 5 are loosened, and when said bolts are tightened, the entire mandrel-supporting means will be rigidly held.

In operating the machine, the screw 26 is operated to raise the slide 25 so that the blades 27 and 29 will be entirely outof the Y,way when placing the core-carrying mandrel in the machine. One end of the mandrel is engaged with the plug 45, the slide 49 is then slidinwardly until its plug 46 will properly engage the other end of the mandrel, and said slide is then locked if locking means be ,provided for it. The screw 27 is now operatedv to lower the slide 25's() that the knife 27 will cut almost entirely through the core 28 during its travel in the direction A, and the screw 19 is then driven in the proper direction to eect such carriage travel. As the'knife 27 operates to cut most of the way through the core 28 (Figs. 1 and 6), the knife CTI 29 merely trails idly in the bottoni of the cut, as shown in these views. When the carriage 17 is reversed however, the knife 29 moves to the operative position shown in Fig. 7 and cuts through the remaining layers of the core. Hence, movement of the carriage first in one direction and then in the other, effects complete cutting of the paper core from the mandrel and leaves the carriage at the proper end of the machine Vfor starting another core-removing operation.

The general structure shown and described has proven to be desirable from numerous standpoints and is therefore preferably followed. However, within the scope of the invention as claimed, variations may be made, as above stated.

I claim l. A machine for cutting a tubular core from a mandrel, comprising a frame, a carriage guideway carried by said frame, t-wo supports for the ends of a mandrel, said supports being carried by said frame and mounted for relative shifting according to the length of the mandrel, said supports being positioned to support said mandrel in parallel relation with said guideway, a carriage movable along said guideway, a cutter mounted on said carriage forcutting the core, and means for moving said carriage along said guideway.

2. A machine for cutting a tubular core from a mandrel, comprising two rigid end members, two parallel rods extending between said end members and secured thereto,

a mandrel-engaging supporting member mounted between said rods at one end of the latter and adapted to engage one end of a core-carrying; mandrel, a slide adjustable along the other ends of said rods, a second mandrel-engaging supporting member fixedly carried by said slide and adapted to en gage the other end of the mandrel, and

A means for cutting the core from the mandrel while held by said supporting members.

3. A machine for cutting a tubular core from .a mandrel, comprising two rigid end members, carriage guiding meansl extending between said end members, a carriage movable along said guiding means and having a knife for cutting the core, two supporting members for engagement with the ends of the core-carrying mandrel to hold the latter in position for cutting of the core with said knife, a slide carrying one of said supporting members, two parallel rods along which said slide is movable, said rods being disposed at opposite sides of said supporting members and parallel with said carriagel guiding means, two transverse bars to which the ends of said rods are secured, the other of said supporting members being carried by one of said bars, and adjustable means securing said bars to said end members and allowing'adjustment of said bars and rods toward and from said carriage.

t. A machine for cutting a tubular core from a mandrel, comprising a frame, -a carriage guideway carried by said frame, a carriage and means for moving it along said guideway, means for supporting the corecarrying mandrel in parallel relation with said carriage guideway, one knife mounted on said carriage for cutting most of the core thickness as the carriage travels in one direction, a second knife for cutting the remaining thickness of the core as the carriage travels in the other direction, and means movably mounting said second knife on said carriage for allowing said `second knife to move idly when the carriage travels in said one direction and for allowing said second knife to move to operative position when said carriage travels in the other direction.

5. A. machine for cutting a tubular core from -a mandrel, comprising a frame, a carriage guideway carried by said frame, a carriage Iand means for moving it along said guideway, means for supporting the corecarrying mandrel in parallel relation with said carriage guideway, one knife mounted on said carriage for cutting most of the core thickness as the carriage travels in one direction, a secon-d knife for cutting the remaining thickness of the core as the carriage travels in the other direction, said second knife having a cutting edge at an angle to the line along which the carriage moves, and means pivotally mounting said second knife on said carriage upon an axis transverse to the line of'movement of said carriage, whereby said second knife may swing to an idle trailing position when the carriage moves in said one direction and may swing to operative position when the carriage moves in the other direction, said carriage having a stop for limiting the last mentioned swinging movement of said second knife.

6. A structure as specified in claim 4; together with spring means o n the carriage for pressing said second knife against the mandrel while in operation, saidV second knife having a blunt portion independent of its cutting edge adapted to slide Ialong said mandrel.

7. A structure as specified in claim 5, said pivotal mounting means for said second knife embodying means allowing shifting of said second knife transversely of the line of carriage movement, and spring means acting on said second knife for pressing the latter against the mandrel when in operation, said second knife having a blunt edge independent of its cutting edge adapted to slide along GEORGE ST. PETER.

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