US2553052A - Mandrel core cutting, loading, and ejecting mechanism - Google Patents

Description

May 15, 1951 a. M. KWI K MANDREL CORE CUTTI LOADING, AND EJECTING MECHANISM 3 Sheets-Sheet 1 Filed April 18, 1949 y 1951 G. M. KWlTEK 2,553,052 mam com-z CUTTING, Lemme,

AND EJECTING MECHANISM V EN TOR.

ATTORNEIG.

y 15, 1951 G. M. KWITEK 2,553,052

MANDREL CORE CUTT ING, LOADING, AND EJECTING MECHANISM Filed April 18, 1949 3 Sheets-Sheet 3 ATTORNEYS.

Patented May 15, 1951 UNITED STATES MANDREL CORE CUTTING, LOADING, AND EJECTING MECHANISM Application April 18, 1949, Serial N 0. 88,132

10 Claims. 1

My invention relates to an improved mechanism adapted to receive a mandrel carrying a unitary paper tube and automatically operable to cut the tube and wind a plurality of webs of paper or the like thereon. This invention is an improvementupon my pending patent application S. N; 22,485, filed April 21, 1948, now Patent No. 2,512,900, granted June 27, 1950, and upon my patent No. 2,237,759 granted April 8, 1941.

In the operation of the machines described in the. above application and patent, paper core sections are fed separately to a mandrel by the operator. The operator thereupon places the mandrel. on the machine. for winding. f'his is a time consuming and difficult manual operation because the mandrel with its paper core on it must bemanually placed in the winding arbor.

It is a general object of the present invention to provide an improved paper winding mechanism capable of receiving a mandrel received in a unitary tube or core.

Another object of the present invention is to provide an improved mechanism to cut rolls of paper or like material.

Yet another object of the present invention is to provide an improved mechanism to feed mandrels automatically to a mandrel carrying spider.

It is further an object of the present invention to provide a core cutting, feeding, loading and discharging structure that may readily be interconnected with the operating elements of a paper winding machine.

It is yet another object of the present invention to provide an improved mechanism to pick up mandrels on a spider and to discharge the same therefrom.

The novel features which I believe to be char-- acteristic of my invention are set forth with paticularity in the appended claims. My invention itself, however, both as to its organization and method of operation can best be understood by reference to the following description taken in connection with the accompanying drawing in whic Figure 1 is a somewhat diagrammatic view of a complete paper winding machine incorporating the features of the present invention;

Figure 2 is a view of the core cutting portion of the mechanism of Fi ure 1 in the discharging Figures 4 and 5 are enlarged fragmentary views through axes 1- 1 and. 55, Figure 1, respectively;

Figure 6 is a view in perspective of the cam track as seen from underneath and to one side;

Figure 7 is a fragmentary top plan view of the core cutting discs of Figure 1;

Figure 8 is a somewhat diagrammatic View of the mandrel drive mechanism of the machine of Figure 1;

Figures 9, 10, 11 and 12. are views of various mandrel and chuck end sections that may be used with the mechanism of Figure 1; and,

Figure 13 is a fragmentary developed View of cam track '18, Figure 1.

Referring now to Figure 1, the paper winding machine receives paper in a wide strip or web from: the feed roll B. This roll is suitably supported by means not shown and is free to rotate to release its contents. The web W unrolling from roll R travels over the idler or guide roller 20 to be fed upon the bed roll 22. Roller 20 is held in snug engagement with bed roll 22 by means not shown to assure a positive drive of the web in accord with the rotations of bed roll 22.

The web W is wrapped around bed roll 22 from point 22a where it is received thereon to point 2% where it is released therefrom.

The bed roll 22 is provided with a plurality of longitudinal notches 22c spaced by the length of the sheets to be formed. Each notch is adapted to receive a knife 2% on perforating roller 24 to perforate web l/V a it rides on the bed roll 22. Roller 24 is driven in synchronism with the bed roll 22 to assure accurate indexing of the knives 26a and the notches 220 of bed roll 22.

After travelling past the perforator roller 24, web W is carried past longitudinal slitter 25. This slitter has a plurality of disk knives 2611. which bear against the web and cut the same lengthwise to form strips of the width desired to be wound. In forming toilet tissue, for example, the knives 26a may be spaced about 4%; inches and the web W may be about inches in length.

Vlhen the web W leaves bed roll 22 it travels to the mandrel 28 that is in the winding position on spider 32. This mandrel is driven by means described hereafter to wind the web to form the separate. rolls of paper. As will be described hereafter, each mandrel receives a tube or core of cardboard that is cut to define sections to receive each strip of the web W and is in registry therewith.

When the mandrel 28 has received its full number of sheets of web, the knife 32 on bed roll 22 is extended and cuts the web. Thereafter the mandrel 28 and the rolls formed thereon are carried to the discharge or upper position of the spider 3i} and are released to roll down the discharge track A plurality of mandrel carrying completely wound cores are shown on the discharge track at 36.

The spider 39 is carried by spaced arms 48 which are swingably supported from the shaft 46. The spider and arm assembly is rocked in accord with the spider rotations by the cam 260. Rollers (not shown) on the ends of the spider 353 at each mandrel receiving position ride on the cam 29% to impart this movement to the spider.

Mandrels 28 are fed to the spider 39 from the sloping feed track 38. The mandrels are each placed manually inside of a cardboard tube or core 28a before being placed on track 38. They are singly discharged from track 38 and are received in the core cutting mechanism indicated generally at 48. Thereafter, the mandrels are discharged to the parallelogram track-defining linkages 62 from which they are picked up by the pider 35.

The drive mechanism The mechanical drive for the machine is taken from main drive shaft M. This shaft is located above bed roll 22 and is driven by suitable means such a an electric motor (not shown).

The bed roll 22 is driven from shaft 44 by the pinion gear 45, Figure 8, which meshes with the teeth 23 formed on one side of the bed roll 22. Bed roll 22 is accordingly driven in fixed relation to the rotations of the main drive shaft M.

The spider 38 i continuously rotated by drive shaft 44 through shaft 45, by means not shown. The shaft Q6 is coincidental with the point of pivotal support of the hanger or arm 48 which carries the spider 3i Shaft ii: drives spider 30 by means of a belt or similar drive connection (not shown). Shaft 46 is in turn driven from drive shaft 54 by a drive connection having a suitable step down ratio so that spider 39 rotates one-fifth of a revolution while bed roll 22 releases the paper to be contained on each roll.

The driving connection between shaft 44 and spider 36 is so arranged that shaft 46 executes one revolution while bed roll 22 releases the paper desired to be contained on each roll. A to 1 step down is provided in the drive connection between shaft 45 and spider 3B.

The perforator roll 24 is driven from shaft 44 to have peripheral velocity equal to the peripheral velocity of that shaft.

The knife 32 is mounted on spring 3! to be biased outwardly and cut the web W. However, this knife is held in a retracted position against the spring bias by arm 320. which rides on a stationary cam 33 that normally holds the knife in the retracted position. The cam has a shiftable segment 3 3a that is shifted out of position when the quantity of paper desired to be rolled has been carried by bed roll 22. When this takes place, the knife 32 is released at approximately the point 221) to cut the web W. Winding rotations are imparted to mandrel 28 by the drive chuck 59, Figure 5. This chuck is splined or otherwise attached to the shaft 52 which receives the clutch plate 55. Clutch plate 5 5 receives a felt-like facing material 5 in which bears against the annular side face of the drive pulley 56.

A drive chuck 59 and the associated clutch mechanism and pulley is provided for each of the five mandrel receiving positions on the spider 3t, 7 I The drive arrangement for pulleys 58 can best be understood by reference to Figure 8 which d shows the spider 3c in the position where winding is about to be transferred from mandrel 28a to mandrel 2837. As shown, the main drive shaft it carries the drive pulley Ma that receives belt 53 having a V-shape on its opposite sides so that it can receive a V-pulley on either side. From pulley Ma, belt 58 traverses idler pulley 60 and then travels over the drive pulleys 56a and 55b for mandrels 28a and 28b, respectively. Thereafter, the belt 58 travels over idler pulleys B2 and E i to return to the drive pulley a.

The size of pulleys Ma. and 56a and 561) are so related that when the mandrels are unloaded the peripheral velocity of the core slightly exceeds the linear velocity of the web. This causes the web to wind tightly. As the roll builds up and the peripheral velocity of the roll tends to increase by reason of the constant angular velocity of the drive pulleys, the clutch facing 54a, Figure 5, slips relative to pulley 56 or to plate 54 to present breakage of the web W While maintaining it taut.

It will be observed that the mandrels are driven only when they are in the web-receiving position. At all other times they are free to rotate. If desired, however, brake means (not shown) may be provided to arrest rotation of the mandrels after they are loaded.

M andrel pickup and release Mandrels are automatically picked up and released as the spider 39 rotates. This is achieved by retracting the mandrel-receiving chucks in the regions adjacent the points of mandrel pickup and release.

The structure of the mandrel-holding chucks will be evident from the views of Figures 4 and 5. As shown, the chucks 5!! and 66 have flanges 50a and 56a on their forward ends and have mandrel receiving notches 56b and 66b. The latter are in registry with each other to support a mandrel in axial alignment with the axis of rotation of the spider 30.

Chuck E8 is slidingly received in the hollow shaft or cup 53 which is in turn supported on spaced bearings 10. A spring 12 is received in the recess of shaft 68 to bias chuck 66 to the extended or mandrel-engaging position. If desired, chuck 56 may be spined to shaft 68 to avoid any tendency to wind or unwind spring 12.

Chuck 5%! is similarly received in the hollow end of a shaft 52. Spring 14 is received in the hollow end of shaft 52 and bottoms against that shaft and the chuck 59 to urge the latter to the extended or mandrel-engaging position.

When a mandrel 28 is received between chucks 66 and 58 and they are free to assume their extended positions, the mandrel is securely held in place on spider 5t and rotates in accord with the rotations imparted to chuck 50.

When the mandrels are picked up from track 42 chucks 55 and 50 are retracted against the bias of their respective springs to permit the chucks to swing to a position in registry with the incoming mandrel. This is accomplished by the cam track defining portions l6 and T8 of the cam track it. Cam track 15 constitutes the cylindrical rim on the disk 80.

As seen best in Figures 5 and 6, the edge of cam track '55 is turned inwardly to overhang towards the center of spider 30 and to extend inwardly to engage the rockable pick-up hooks or hook-like arms 82. As shown in Figure 5, the inturned portion 26a. of the cam track H5 engages the rockable hpoks 82 which in turn bottom against the flange portions 50a and 66a of the chucks 5G and 6G to overcome the bias of the springs. 15 and "I2 and retract the chucks.

Movements of the hooks 82 in response to the bias of springs M and '52 are limited by the stop members 82b and 30a.

The cam tracks it are positioned on opposite ends of the spider 3?) in the region adjacent discharge track 3d. The inturned portions of these tracks, 75a, Figure 6, are made of suflicient size to retract chucks 6t and 50 to spaced positions relative to the mandrel 28 and release the mandrel to track 34. The mandrel thereafter rolls down discharge track 34.

The cam tracks I8 are mounted on opposite sides of spider 33 adjacent parallelogram tracks 42. These tracks have inturned portions 18a, Figure 13, of sufficient size to retract chucks 66 and 5%) to spaced positions relative to the mandrel 28 carried by track 42.

As the spider 39 rotates, the hook 82a adjacent track 42 engages the mandrel 23 on that track and pushes it forwardly. The cam track it then releases the chucks hit and 68 to grasp the mandrel and thereafter carry the mandrel. Figure 3.3 is a developed view of cam track 78, Figure 1, showing how thattrack first retracts chucks 5L and 66 to travel to aligned positions relative to the mandrel without interference (portion 15b of the track) and then releases the chucks engage the mandrel (portion (So of the track).

Core cutting The cutting mechanism it cuts the cores Eta on the mandrels 28 to form a plurality of sections therefrom. This mechanism comprises a pair of complementary cutters 8d and 85 defining gered cutting disks or knives as shown in Figure 7. Cutters 84 and 86 are carried by a common rockable carriage defined by the shaft 88 and the cranks 98 and Q2 pinned. or keyed thereto.

Cutters 8d and 3-5 are mounted on the freely rockable arms 94 and 95, respectively. Springs 518 and Hill are interposed between arms $54 and 96 and the cranks 9i and 52 to cause the former to follow the rocking movements of shaft 88 while at the same time permitting relative closing movement of the cutters 8t and 86 as the cores 23a are out.

A drive roll I 82 is positioned in alignment with the cutters 84 and 86 when the carriage defined by shaft 38 is in the intermediate position shown in Figure 1. This roll is driven by motor it through belt I 86.

Rockable trigger I08 is located on the end of track 38 as shown in Figure 1. This trigger defines member 5880. which engages the mandrels 28' to hold the same against movement.

The trigger B68 is connected to the shaft 83 by the link H3 and the crank I22 to cause the trigger to partake of the rocking motions of the shaft 88 and the carriage defined thereby.

When the shaft 83 is rotated in the counterclockwise direction to cause cutters 8d and 8a? to face track 38, the trigger 508 is rotated to the retracted position shown in Figure This releases the last mandrel 28 and permits that inandrel to roll onto cutters as and 8%. When the carriage defined by shaft 88 is subsequently re stored to the intermediate position shown in Figure 1, the mandrel is carried in the nip betwee' these cutters and the core 28a out.

The mandrel 28' is discharged from cutter mechanism 40 by clockwise rocking movements of the carriage defined by shaft 38 as shown in Figure 2. This releases the mandrel to roll off on the. track defined by parallelogram linkages. 42. The cutting mechanism is actuated in response to the needs of spider 30 by the linkage that can be traced from cam I26, through cam follower and crank arm I28, link I36, crank 532, link it i, and crank I36 which is keyed to shaft 88. The cam I25 is afiixed to shaft at and makes one rotation in the time period required to wind paper on a mandrel. Consequently, a new mandrel is to be fed for each rotation of that cam.

Cam I26 rotates in the counterclockwise direction. As it rotates from the position shown in Figure l, the follower E23, which is spring biased downwardly, rides into dip l2iia to rock the shaft 88 to the position of Figure 2 and release a mandrel to track I It as shown. Thereafter, the cam follower I28 rides over projection I261) to rock the carriage defined by shaft 83 to the position of Figure 3 where a new mandrel is picked up. Thereafter the follower 52d rides on the intermediate portion of the cam I26 where it holds the carriage defined by shaft 88 in the intermediate position. The carriage dwells in this position for the remainder of the time available before a new mandrel is required by spider 33.

M andrel feed The parallelogram linkages i2 feed the mandrels singly to the spider 33. These linkages are located on opposite ends of the spider to define a track capable of receiving the mandrels.

The upper rails or links I it of the parallogram linkages 42 are fixedly supported and extend from the cutter mechanism 49 to the pickup point of spider 3% The links H6 and iii). are pinned to these rails and are connected at their lower ends by the lower link I26 to define a parallogram. A compression spring I22 bottoms at its opposite ends against link H18 and projection H5 formed on link i It to urge the parallogram linkage to the rectangular shape.

The parallogram linkage t2 normally assumes a nearly rectangular shape as shown in Figure 3. In this condition it restrains the mandrels 28 by reason of the extended portions l the and I $312 of the links Il=6 and H8, respectiveiy. However, when the hooks 82 engage the mandrel held by link H8, the bias of spring I22 is overcome and the whole linkage collapsed as shown in Figure 2. This releases the mandrels to move on track i i, the first mandrel being picked up by the spider 38 and the other mandrels each advancing position.

Each mandrel 28 travels over glue roller i313 to receive a spot of glue to grip the web W when that web is subsequently cut by knife 32.

As shown in Figuresv 9, 10, 11, and 12, the ends of the chucks and mandrels may be of square, octagonal, or other non-circular mating shapes. Figures 9 and 11 are fragmentary axial crosssectional views of the chucks and Figures 10 and 12 are end elevational views of the corresponding mandrels, respectively.

It is desirable to use hollow mandrels 28 and to harden the portions thereof adjacent the points of contact of cutting knives 8a and B6 to achieve maximum mandrel life. This hardening may be accomplished by induction heating and appropriate quenching.

As shown in Figure 6, member has a window to receive the belt 58.

While I have shown and described a particular embodiment. of my invention it will be understood that I do not wish to be limited thereto but intend by the appended claims to cover all modifications and alternative constructions falling within the true spirit and scope of my invention.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. A mechanism for use with a machine havin a rotatable spider adapted to receive mandrels each carrying an array of cores, said spider being of the type adapted to receive an additional mandrel each time it is rotated a predetermined distance, said mechanism comprising means adapted to receive a plurality of mandrels each carrying a unitary core, trigger means interconnected with said spider and adapted to release one mandrel from said means each time said spider is rotated said distance, and means to feed said mandrel to said spider, said last means including elements adapted to cut the core on said mandrel to form an array of cores to be received on said spider.

2. A mechanism for use with a machine having a rotatable spider adapted to receive mandrels each carrying an array of cores, said spider being of the type adapted to receive an additional mandrel each time it is rotated a predetermined distance, said mechanism comprising means adapted to receive a plurality of mandrels each carrying a unitary core, trigger means interconnected with said spider adapted to release one mandrel from said means each time said spider is rotated said distance, and means operable in synchronism with said spider adapted to receive said mandrels as they are released and cut the cores on the same to form an array of cores to be received by said spider, and feedingmeans operable in sequence with said last means to transfer the cut cores to said spider.

3. A cutting mechanism adapted to cut a core of paper or the like to form a plurality of sections, said mechanism comprising complementary cutting disks mounted on a rockable carriage, spring means interposed between each of said disks and said carriage and operable to urge said disks towards each other, and a drive roller in alignment with said cutting disks when said carriage is in an intermediate position and adapted to bear against the core on said disks to urge it against said cutting disks.

4. A cutting mechanism adapted to cut cores of paper or the like to form a plurality of sections, said mechanism comprising complementary cutting disks mounted on a rockable carriage, a drive roller in alignment with said cutting disks when said carriage is in an intermediate position and adapted to bear against the mandrel on said disks, a track extending to proximity with said carriage, and trigger elements operable to release cores singly to said cutting disks when said carriage is tilted towards said track.

5. A cutting mechanism adapted to cut cores of paper or the like to form a plurality of sections, said mechanism comprising a pair of complementarycutting disks mounted on a rockable carriage, a drive roller in alignment with said cutting disks when said carriage is in an intermediate position and adapted to bear against the core on said rollers, tracks extending to proximity with said carriage on opposite sides thereof, and trigger elements operable to re lease cores singly to said cutting disks when said carriage is tilted towards one of said tracks.

6. A mechanism to cut cores of paper or the like and discharge them to a. predetermined point, said mechanism comprising a pair of complementary cutting disks mounted on a rockable carriage, tracks sloping downwardly towards and away from said carriage and on opposite sides thereof, a drive roller mounted in registry with said cutting disks when said carriage is in intermediate position, a trigger on the track sloping towards said carriage adapted to restrain movement of said cores from said track to said carriage, and'elements interconnecting said carriage and said trigger to actuate said rigger when said carriage is rocked to tilt towards said track.

7. A mechanism to cut cores of paper or the like and discharge them to a predetermined point, said mechanism comprising a pair of complementary cutting disks mounted on a rockable carriage, tracks sloping downwardly towards and away from said carriage and on opposite sides thereof, a drive roller mounted in registry withisaid cutting disks when said carriage is in intermediate position, a trigger on the track sloping towards said carriage adapted to restrain movement of said cores from said track to said carriage, and elements interconnecting said carriage and said trigger to actuate said trigger when saidcarriage is rocked to tilt towards said track, and means operable in sequence to tilt said carriage towards said track sloping towards said carriage, rock said carriage to said intermediate position, and tilt said carriage towards the other of said tracks.

8. A guide track and trigger mechanism to release mandrels singly to a rotatable spider comprising a pair of spaced parallelogram linkages having their upper links oriented to define rails extending to the mandrel pickup point of said spider, the transverse links extending above said upper links to define triggers, and means operable to collapse said links as the mandrel-receiving point on said spider passes said links.

9. A guide track and trigger mechanism to release mandrels singly to a rotatable spider mounted on a swingable arm of the type that executes a full swing each cycle of operation, comprising a pair of spaced parallelogram linkages having their upper links oriented to define rails extending to the mandrel pickup point of arms and adapted to carry mandrels, said elements being engageable by said arms, and stationary cams operable to engage said arms to rock said arms in direction to retract said chuck elements to receive or discharge mandrels.

GEORGE M. KWITEK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,765,208 Cunningham July 17, 1930 1,966,525 Schultz et al. July '17, 1934 2,366,999 Campbell Jan. 9, 1945 2,385,692 Corbin et a1. Sept. 25, 1945

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