US2635824A

US2635824A - Reel-slitting and rewinding machine

Info

Publication number: US2635824A
Application number: US118859A
Authority: US
Inventors: Schneider Max
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-10-01
Filing date: 1949-09-30
Publication date: 1953-04-21
Anticipated expiration: 1970-04-21

Description

April 21. 1953 M. SCHNEIDER REEL SLITTING AND REWINDING MACHINE 2 $!-lEETS--SHEET 1 Filed Sept. 50, 1949 Apnl 21, 1953 M. SCHNEIDER REEL SLITTING AND REWINDING MACHINE 2 SHEETS-SHEET 2 Filed Sept. 30, 1949 22/61650 fizz 605/: e zde/ Patented Apr. 21, 1953 REEL- SLITTING AND REWINDING MACHINE Max Schneider, Dusseldorf, Germany Application September 30, 1949, Serial No. 118,859 In Germany October 1, 1948 7 Claims. (01. 242-75) This invention relates to a reel-slitting and rewinding machine for slitting and rewinding webs of paper, or the like, with a pressure roller carried by a hinged cutter head above the windin spindle against the reel to be wound, on which the oscillating cutter head is relieved through spring power.

There are reel-slitting and rewinding machines known with a pivotally mounted cutter'head, which is provided with a total or partial counterbalancing of the weight of cutter head by adding or removing a number of counterpoises or by displacing counterpoises and supporting levers. The adjustment over the width of Web is obtained by providing counterpoises of different sizes or numbers on both sides, or by setting slide weights on levers distributed over the width of machine. These devices are troublesome to the attendants and unwieldy in operation owing to the space required and the very bulky arrangement, for counterbalancing oradjusting the bearing pressure, the interchange or regulation of the weights has to be done during the winding process, thus diverting the operator from his real task with the result of increasing the threat of danger. The adjustment of the pressure is left to the feeling of the attendant who makes the changes of weight at more or less regular intervals, thus considerably affecting the uniformity of tension of the winding in an unfavourable manner.

Having in mind the defects of the prior art apparatus, it is the principal object of the invention to provide a web slitting and rewinding machine that is compact and wherein counterment of the counter-balance may be readily effected during operation.

It is a further object of the invention to provide a machine of the present typewherein the counter-balancing is variable during each stroke and provides a substantially uniform tension.

It is a still further object of the invention to provide a machine of th present type, simplicity of design, economy of construction and efficiency in operation.

The foregoing objects and others ancillary thereto are preferably accomplished by mounting the pressure head eccentrically on the reel spin- .dle support for vertical movement of a pressure roller carried by said head relative to a reel on said spindle, and counter-balancing said head by means of link means connected to said head and biased by rectilinear spring means onsaid support to continuously counter-balance said head regardless of its relative angular position to maintain a uniform tension on the .web being wound on the reel.

The novel features that are considered characteristic of the invention are set forth with particularity in the appended claims. The invention, itself, however, both as to its organization and its method of operation, together with additional objects and advantages thereof, will best be understood from the following description of specific embodiments when read in connection with the accompanying drawings in which:

Fig. 1 represents a longitudinal section through a reel-slitting and rewinding machine with discharge by tension springs, and

Fig. 2 shows a longitudinal section through a reel-slitting and rewinding machine with discharge by compression springs.

The winding spindle 2', destined to receive the reel I on which the treated or slit web forming a roll is to be rewound, is carried on the two side frames 3 of the slitting and rewinding machine. On these side frames two pedestals I are fixed, in which the cutter head with its two side checks 5 are slewably or oscillatably mounted. At the same time, a guide roller 6 is placed around the center of rotation of the cutter head for conducting a paper web I coming from a parent reel not represented in the drawing. In the front part of the cutter head, between the two side checks 5 thereof, the cutting cylinder 9 the coacting pressure receiving or counter-cutting cylinder [0, the reversing roller H and the pressure roller l2 are provided besides a further guide roller 8.

In the form of embodiment represented by Fig. l, aguide rail It is fixed, on both sides of the cross rods I3 connecting the two sid frames 3. The front end of the guide rail M is formed as a bearing for the regulating spindle [5, on the threaded part of which the spring guide 16, secured against twisting by the guide rail 14, is provided, the tension spring I! being fixed to the spring guide [6. The other end of th tension spring is fixed or pivota-lly connected to the trailing lever l9 by means of a spring eye I8, one arm of this lever carrying the guide roll 29 which rolls off on the guide rail l4, while the other arm attacks the transmission arm of the cutter head.

' As shown, the transmission arm of the cutter or V cutter pressure head is a short depending arm to which the upper arm of the trailing lever l9 opposite the guide roll 20 is pivotally connected to rise with the connection as the cutter head and pressure roller 52 move down while the roll 26 moves rearwardly on the guide rail [4. As the cutter head and pressure roller I2 move upwardly with the increasing size or diameter of the reel or roll on the winding spindle 2 a the winding progresses the upper end of the trailing lever '9 swings downwardly and forwardly with the corresponding swing of the transmission arm and pressure or cutter head while the guide roll 29 travels rearwardly on the rail it to compensate for the progressive change in the relative pos'itions of the parts and maintain a constant pressure of the pressure roller l2 on the web and wound roll after the first few turns or windings on the spindle or reel to insure uniformity of the winding.

The mode of action of the reel-slitting and re- Winding machine is as follows:

The paper web 7, to be "cut and rewound, is guided in known manner from the supply reel (not shown) over the guide roller 6 and under the guide roller 3, between the cutting cylinders 9 and it, where the counter-cutting cylinder or pressure receiving roller It backs up or takes the pressure of the treating or cutting cylinder 9; against the web, and over the reversing and pres sure rollers l1 and F2, to the rewinding reel 1. With the beginning of the rewinding operation, the oscillating cutter head will be raised with the growing diameter of the reel by means of the pressure roller 12 lying on top of the rewinding re'el The pressure between the pressure roller I2 and the winding reel 1, determined by the weight of the cutter head and the tension of the paper web I, is opposed by the tension s ring I i in transferring its power on the trailing lever is. The continuous change of bearing pressure, dependent upon the radius of center of gravity of the cutter head, the weight of the head, the springs and tension of the web, together with the fact that the swing or pivot axis of the cutter head within guide rollert, is above the spindle 2 and reel 01' 'roll 1 and the cutter head swings below or above said axis and inclines forwardly in its initial and early stages, will be compensated by the position of the trailing lever 19 and the change of position of the cutter head, connected therewith and occurring in a like ratio, as well as position of the transmitting arm. Con sequently there is a state or" equilibrium, or, by

adjusting the regulating spindle 15, a pressure i wanted and remaining constant within the range of work, between the pressure roller 42 and the rewinding reel I. The distribution of pressure over the width 0 paper web can be adjusted, if unevenness of paper makes it necessary, by changing the spring tension by means of regulating spindles 1:5 separately on either side and independently one of another.

With the example of embodiment represented by Fig. 2, balancing the cutter head is obtained in such a way that two compression springs 21, provided in pairs on both sides and opposing one another, counterbalance the weight of the head. The compression springs 21, mounted on a spindle 22, are enclosed in spring cases 23 which slide on the spindles 22 and the annular bottom areas or inner ends of which around the spindles, opposed to one another, receive the spring compression. The bushes 24 applied to the outer ends of the spindles 22 on both sides of the machine within side frames 3 serve as a means for guiding the spring cases 23 and as abutments for the outer ends of the compression springs 2|. At the rear end of the spindles 22, they are secured against displacement by the nut 25, and at the threaded front ends of the spindles 22, they are made adjustable through the hand wheels .26. The spring cases 23 carry the fulcrums P of the knee levers 21, the common upper working point P1 of which is situated in the side pieces or cheeks 5 of the oscillating cutter head, whilst their lower bearing point P2 lies in the side frames 3.

The operation of the relieving device representedin Fig. 2 is asfollows:

The compression springs placed in the spring cases rest with their exterior ends against the bushings 24, whereas their force of pressure, directed against each other, transmits itself to the V fulcrums or hinge points P by applying towards the annular bottom areas or inner ends of the springc'ases 23.

During the rewinding process, the spring cases 23 are displaced relatively toward each other on the spindle 22 and lessen their interspa'ce ac cording to the growing diameter of the reel, whereby the mechanically/operated stretching of the springs or collapsing movement of the 'knee levers 2-7 toward-each other causes the transmission-of spring power upon the common point of appllcation P1 at the side cheeks 0f the 'oscillat able cutter head, opposing thereby the Weight of the cutter head. By adjusting the hand wheels 26 on the spindles 22, the state of equilibrium thus obtained can be transformed into a bearing pressure of the cutter or pressure head and or the pressure roller 12 against the web 7 on the rewind-mg reel or roll I remaining constant within the working sphere. Otherwise the method of operation of this reel-slitting and rewindi-ng machine is equal to or the same as that described in the example of embodiment according to Fig. 1.

I claim:

1. A winding and reeling device "comprising a support, a spindle .journalled on said support for winding a web thereon, a pressure head :pivotally mounted eccentrica'lly on said support to swing vertically relative to and gravitate toward said spindle, a pressure roller carried by said head and.

swing vertically relative to and gravitate toward said spindle, apressure roller carried by said head :andengageable with a web wound on said spindle to maintain a tension "on the web, link means connected to said head, and rectilinear spring means anchored to said support and biasing said link means to continuously counterbalance said head regardless of its relative angular position to maintain a uniform pressure by said roller on the wound web as the diameter of the wound web increases.

13.,A device as defined in claim 2 wherein said link means comprises a lever pivotally connected at one end to said head, a roller journalled on.

the other end of said lever, a. guide on said support for said roller, and a Spring engaging member pivotally connected to said lever intermediate its ends.

4. A device as defined in claim 3 wherein said spring means comprises a threaded spindle pivotally mounted parallel with said guide, an adjustable spring engaging member threaded on said threaded spindle and engaging said guide to be retained against rotation on said threaded spindle, and a coiled spring surrounding said threaded spindle and connected at its ends with said respective spring engaging members.

5. A device as defined in claim 4 wherein said head is in the form of a bell-crank pivotally mounted at its elbow on said support and carrying said pressure roller adjacent the end of one arm and connected to said link adjacent the end of its other arm.

6. A device as defined in claim 2 wherein said spring means comprise a spindle, a spring engaging member fixed on said spindle adjacent each end thereof, a pair of springs coiled about said spindle and respectively abutting said engaging members at their oppositely disposed ends,

and a pair of spring engaging members slidable on said spindle between and respectively engaging the adjacent ends of said springs, and said link means comprises a pair of links each pivotally connected at one end by a common pivot to said head and at their other ends to said slidable spring engaging members respectively, and a pair of links each pivotally connected at one end by a common pivot to said support and at their other ends to said slidable spring engaging members.

7. A device as defined in claim 6' wherein said spindle is threaded at least at one end and the engaging member at that end is threaded thereon.

MAX SCHNEIDER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,878,381 Continsouza et a1. Sept. 20, 1932 2,190,106 Peterson Feb. 13, 1940 2,223,445 Doble Dec. 3', 1940 2,270,043 Fourness et a1 Jan. 13, 1942 2,293,178 Stocker Aug. 18, 1942 2,312,173 Johnstone Feb. 23, 1943