US2053022A - Paper guide - Google Patents

Description

s p 1936- R. H. CORSWANDT ET AL 2,053,022

7 PAPER GUIDE Filed Jan. 12, 1955 INVENTORS: I/WW ATTORNEY tainers such as that illustrated and described in ccnnection with a telegraph printing apparatus shown" in U. S. Patent No. 1,821,110, issued to Patented Sept. 1, 1936 PATENT OFFICE} PAPER GUIDE Ralph H. C'orswandt, Chicago, and Walter J. Zenner, Des Plaines, Ill., assignors to Teletype Corporation, Chicago, 111., a. corporation of Delaware .Application January 12, 1935, Serial No. 1,448

8 Claims.

The present invention relates to containers for coilsof web material and more particularly to guide and tensioning devices for aligning and governing the movements of tape drawn from a stock roll with intermittent acceleration.

Ithas been found that where paper stock is .supplied from a roll having a relatively large peripheral mass, the motion imparted to it by intermittent pulling causes it to gather sumcient momentum to accelerate periodically, resulting inan overunning and gathering of the free end .of the tape beyond the point of egress of the container. Subsequently, when the free end is withdrawn, the overrun loops are frequently gathered in and forced through byfrictional engagement with the free end, resulting frequently in considerable tangling and wrinkling of the .tape. To overcome these undesirable eifects, the

present invention has for its object the provision of means cooperating with a container to prevent buckling and tangling of the tape and to promote direct and. uniform movement of the .liap

In the specific contemplation of this invention, itis applicable to cylindrical or disc type con- ,Sterling Morton et al. In such apparatus, the roll of coil tape is of narrow width and in the case of new coils is usually of comparatively large. diameter, tending towards the attainment of a small frictional component as compared with the peripheral mass. Where in arrangements of this nature a continuous motion is imparted to the roll followed by periodic inter- "ru'ptio'n, thetendency is for the loose end of the coilto overrun within the container, forming irregular folds that double back and forth upon themselves within the space between the coil and the circumferential element of the container.

'Acbdrdingly, it has been proposed to arrange elements which permit the free movement of the you of tape but which confine and govern any overrun portions 50 that the loops formed, if

any, may not interfere with and be fed with the immediate free end as itemerges from the conltainer.

of the container having its opposite end spring prged lightly against the periphery of the roll and pivoted so as to adjust itself as the roll is consumed. The guide acts as a confining mem- .ber limiting the formation of loops and preventing the loops which are formed during extreme conditions from extending upwardly beyond the egress opening in the container. With this attachment, it has been found that the overrun tape is confined in an orderly manner and does not lend itself to wrinkling and tearing as was the case without the provision of the guide element. 7

As a further improvement to the foregoing, an auxiliary guide element was provided resembling 10 it in curvature and constituting a parallel wall to the aforementioned guide. In addition, the auxiliary guide which is also provided with a roller, is spring urged against the periphery of the tape, at a point within a short distance of the free end of the aforementioned guide. The slight pressure of the roller carried by the auxiliary guide was found to introduce sufiicient frictional engagement between the outer layer of ribbon and its next adjacent layer so as to prevent the stripping of the outer layer except between the points at which the two free ends of the guides engage the periphery of the roll. From this point, the two guides are curved gracefully in close juxtaposition toward the egress opening in the periphery of the container. The limited space provided by the confining tendencies of the guides resulted in the prevention, to a larger extent, of the overrunning tendencies and gathering of the loose ends within the container, causing instead the emission of the tape through the guideway and out of the container.

For a more comprehensive.understanding of the present invention, reference may be had to the accompanying drawing and to the following detailed specification in which like reference characters have been assigned to designate corresponding parts throughout and in which:

Fig. 1 is a side elevational view of a container having the cover plate removed, and illustrating a partially consumed roll of web stock material;

Fig. 2 is a view generally similar to that of Fig.1, featuring an embodiment of the present invention in which an auxiliary guide element has been provided to augment the function of the principal guide element;

Fig. 3 is a detailed perspective view of the principal guide element as featured in both Figs. 1 and 2, and V Fig. 4 is a detailed perspective view of the auxiliary guide element illustrated in Fig. 2.

A roll of ribbon material is indicated I0 and is contained within a protective enclosure ll formed of circular-side walls, the rear one of which is indicated l2 and the fore one, not shown,; of '55 periphery and which has associated with it su'i't initia tedable alarm mechanism (not shown) when the lever and follower roller approaclra predetermined point near'the spindlej'llif As thus far described, ne'm'eans are {provided v in the assembly for preventing theaccelerated rotation of roll Ill from overrunning and causing the formation of loops within the container in the peripheral space before the egress opening I 4.

These loop formations it has been found, if not --conflned' are-'carr-ied loop end foremost throughthe opening M when the threadedend "ofthe riiebon issubsequently fed by the action. of the printing or other mechanism.

a To avoid this'undes'irable eife'ctya guide element I1 is provided pivotally secured at H] to a pivot screw about'which one end'of theguide is turned to form an eyelet l8, see Fig. -3 A spring 21 an'chored at 23 to the container engages the guide H at point-22, urging it gently in'a counterclockwise direction about the pivot '19 so that its' free end-Ziengages the periphery of the roll 113. The end 24 is flared outwardly to a slight degree so as to avoid the sharp edge engagement withthe outer layer of ribbon of the-roll I0, while the-main body portion of the guide 11 serves to check the formation of loops and to prevent the overrunning loops which are formed from extending peripherally beyond the region opposite the-opening"; 14, Any loops formed and confined below the opening M have been found not to interfere with the subsequent movement of the tape but to be-c'onsumed in" a regular and orderly manner when the tape is subsequently pulledoutwardly.

To minimize the frictional impediment to the movement of the tape, a roller2'5 is provided 7 near the opening M over which the free'end is supported as itis emitted from the container.

Though the gathering of loose ends and the redoubling of the tape into loop formations-within the container below the guide *I"! has not proven to be of any serious hindrance to the practical movement of the tape supply, it is true, nevertheless, that this overrunningha's no utility in the desired operation and, that as a practical matter, the best results might be fobtained'by its total elimination. "Towards this end the auxiliary guide 26 has oeen provided pivoted withthe roll er 25 and urged byfa torsion -spring 28, whose elements 29 and 3| Test against peripheral wall H and the guide 26 in a' counterclockwise-directiouand similar in action to'the guide H. The free end of auxiliary guide ZE-carries a follower roller Bisupport'ed-bythc upturned trunnions 33 The tendency of roller 32 under theiniiuence of spring 28 is to keep the outer layer of ribbon frictlona liy contiguous-to its next adjacent layer throughout the periphery on the right side of roller 32, as viewed in Fig. -2. Towards the left of roller 'alhowever; where the strippingaction pf portion 24 of guide 11 removes the ribbon, "the tendency of roller 32 hasli'ttle effect, permitting the overrunni-ng of the rtape' within the restricted region between- 1t=he portion '24 10f guide Hand J cause of the moment due to the acceleration of the roller 32. Because of the narrow confines between guide I! and guide 26, however, the available space is so limited as not to permit of the bending or looping of the ribbon strip. This is true throughout the entire channel defined by 5 the cooperating guides, resulting in the forcing of the tape longitudinally out of the channel, as against permittingof its doubling back or bending within the channel. In this way, when, be-

roll i 0, a larger quantity of tape is stripped from the .body of the roll, it is forced entirely out of "The movement of the guides I! and 26 towards the periphery of the roll may best be understood by noting the broken line and solid 20 line positions indicated in Fig 2. independent aotion of guide 511, as featured in Fig. 1, may also he understood by noting the changed positions of guide ll solely.

While the invention has been explained and de- 2 scribed with reference to a particular 'embodimentthereof, it will be evident that numerous modifications and variations may be instituted without departing from the spirit or scope there of. Itjis therefore intended that the specific 39 language of the foregoing description and the detailed illustrations in the accompanying drawing constitute no restriction to the inventive concept except as indicated by the hereinafter appended claims. e r

What is claimed is: I a

1. In a container, means for pivotally supporting a roli-ofwe'b material, an opening in the periphery of the container through which the free end of a-roll is emanated, and a guide element 40 leading from-said opening tangentially to said roll for preventing the overrunning of loose end accumulation within said container in a direction peripherally beyond said opening. 2; A- container for supporting a roll of ribbon material to permit controlled unreelingjthereof including an idler spindle for supporting a roll of ribbon material, a peripheral element having an ope ning through which 'the'material is to be threadedfan-d a guide element having one end pivoted i-n-the proximity of said opening and the other-end spring urged against the perip'heryof said-roll. 1

3. a supporting apparatus for paper ribbon supply rolls, the combination including a spindle 55 upon which a supply roll is pivotally carried, a pair of parallelly arranged and closely spaced guide elements leading from the periphery of said roll tangentially, and spring means for urg- "in-g said elements against the periphery of said roll to adjust-for the diminution of a "supply roll as it isconsumed.

4. In a supporting apparatus for supply rolls, a ribbon material, a horizontal spindle to be inserted through the core of said roll for pivotal 35 support thereof, a guide element pivoted'at one end, spring means for urging the other end against the periphery of said roll, and aguide elementpivoted at one "end and arranged parali lelly respect to said first mentioned guide element including a contacting portion at its opposite end disposed in close proximity to the free end of said first mentioned guide element. in .a container for supporting rolls of rib-- bonimateiial, a cylindrical enclosure member, a W

stud centrally disposed with respect to said member for supporting rolls of ribbon material, a pressure element pivotally supported at one end and spring urged to contact the periphery of said roll, and a guide element pivotally supported at a remote end and spring urged to contact the periphery of said roll at its opposite end at a point adjacent said point of contact of said pressure element.

6. In a container for supporting rolls of ribbon material, a cylindrical housing, an idler pivot centrally of said housing, a guide element spring urged to follow the periphery of a roll supported on said pivot, and a pivotal support for said guide adjacent an opening in said cylindrical member through which the free end of the roll is threaded.

7. In a container for supporting a supply roll of web material under conditions of intermittent unreeling, a guide element spring urged against the periphery of a roll supported in said container, said element contacting said roll at a point near its peripheral locus whereat said web is stripped from its roll, and means for pivotally supporting said element adjacent a peripheral opening in said container.

8. In a container for supporting a supply roll of ribbon material, means to prevent accumulation of ribbon folds due to overrunning of the supply roll comprising a pressure element operative on the periphery of a supply roll, a stripper element in close proximity to said pressure element, and a member afiording a channelway leading from between said elements to a point of egress in the container.

RALPH H. CORSWANDT. WALTER J. ZENNER.

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