US1982703A - Former for printing machines - Google Patents

Description

Dec. 4, 1934.

w. J. STRAIN FORMER FOR PRINTING MACHINES Filed. [1p Pl 1 20 INVENTOR L 3 bll rr lLllsll L r ij i h Patented Dec. 4, 1934 UNIFIED; as;

PATENT OFFICE puny; temporary? trustee 1 AnnlicationApi-il zo; 1932;.seriaruo..es;sss;

momma (crew-ac):

This invention relates to improvements in? formers: for." printing machines with, particular reference: to: those used in; connection: with. mam chines'oftthe high speed rotary typex; The'iormer'.

fixreferred to, is one which doubles or makesthe; preliminary foldilongitudinally: and centrally of a'multiplez running; web;- and it:has;=been: found that those of:- fixed conformations heretofore; used, occasion;various;difiicultiesz Bresent; practiceinow:requirestispeeds.of trans-. latiorr. of: the webs: more? than: twice: as; r at. those of a comparatively:fewryears; agoaanchi addition: to this; newspapers now; have; at. times, a" much: greater nmnbereon-pagesxthanr. thoseeforlli merly producedi. X i

In running apluralityvoitassociated webs over. the prior type of? former, of: fixediconform ti s; it hasxbeen' found thatsan increased; advance: to

suit present high speedi practicetcauses ;frequent'.

:bucklingi of some; of thexwebsaasl-the time element must' be considered and; provided fonim rd r-t0." produce the best'resultsi- It has also beenr found that: with; increase in the: number: of: sheets; and: the; consequent.

2thgreaten thicknessof a. multiple; web; the: tension of theaouter: sheets-, due s to: ithegnecessarily; curved.- delivery, is=so1 great: that; the prior types of: formers break or tear some of them, besides crum-' pling tlie" inner sheetstof the gmupm It i's one ofr 'the objects-ofzthis invention to iprovide a former witha flexible :andzadiustable nose p'ortiom which: willi be.-conformed: to operate: sucrcessfully upon multiple webs at various and: at highspeeds and: also 1. to operate favorably; upon 362" a thinrunningwebxcomposediof a; few sheets? as I well as on a: thicker: one: oomprisingtaflar einumeber of -sheets; aindlbyreasomofi its construction and mode of action the: difficulties; hereinbefore: recited are overcome;

.40: In order" to attain the; improved results. y

means-of this inventionzthe; former-us iconstructed and tliis dual adiustabilityrohviatemtheindiflioul ties herei nbefore mentioned; 5m

It i's-aiso an obj ectofrthe inventibn to; provide.

asformerifoua; running web of-generally, improved construction which is simple, durable. and inex-e pensive. inconstruction; as well as convenient, practicaLservioeable and efiicientin use.

- Withthe'f1oregoing. and: othen objects? in view, whichmill appear. asthe. descriptionrproceeds,the I invention,- resides in.v the combination and. arrangement; of parts, "and" in the details of construction hereinafter described and claimed, it. being understood that various. changes: in the precise embodiment of the: invention herein disclosed may be madeiwithin the scope: of what is claimed without departing;fromithespirit of, they invent-ion. v

A preferred; embodiment of theinvention illustrated -in the accompanying drawing where-- Figure; 1 is former;v

Figure -2=is a. front elevation thereof looking in: therdirectionwofthe arrow 2 of. Figurevl;

Figure. 31 is a. side elevationofthe improved flexible-andadjustablegnoseaportion.oitheformer; and.

Figure 4 is a rear, elevationthereof viewediin. the direction ofithe; arrow, rot: Figure 3;

Referring now-to the; characters: of; reference on the drawing-:-. I

A portion'of; across framefor the. machine and Which-. supports. theQformen is indicated. as Illwhile;-12 is-a portion of; a. rear side frame of. the apparatus. A portion of the top frameaisiindicated as 134 and a part of.a: front side, frameis indicatedias-lt.

Iihe former1 generally is. indicated as..15. and its body; ispreferably-composed of: a thinplate. of, steel which is supported; and, reinforced at its edges-b n roundv bars or shafts. 16. forming the curvededged portions of the former. in order. to, smoothlyguide-the-web as itisflexed thereover...v

'Iihe-iormer ismounteduponthe carriage 1.7,. which is adapted to support it, and by the opera-. tion' of the; handrwheelzoand its connections is capable; ofs movement laterally,- in: the: directions. indicabedby: the arrows on Figure,2 inorder to accommodate webs" of diiferent widths and to. position them relativelyrtheretc so as, to" insure: a. central longitudinal fold therein.

a side. elevation of.- the.-impr oved.

In-- order tovvarythe inclination of the former 1-5: a rod 18- is pivoted thereto as. indicated and. capable, of being movedlongitudinally and. positioned; by means of the adjusting nut 19- audits companion jamnut-Zl, Theformer 15, isfurther supported by thezbracketor rocker arm ,22 which: isicapableqi; aiswinging movement about the reels.

shaft 23 whereby it may be slightly adjusted in inclination by the nuts 19 and 21 in order to insure the accurate tracking of the running web W, and to flx the position of its upper end adjacent to but not tracking the roller 24.

The web W is delivered to the drag roller 24 which is mounted on the driven shaft 25v and. thence passes downwardly in an inclined direction over the generally triangular former 15 and is given an initial fold thereby. The shaft 25 is rotatably supported in end bearings carried by the frame and is also centrally supported by a bearing at the upper end of the, post 26.

The flexible nose portionof the former, which is preferably composed of a thin elastic steel plate, is indicated as 27 and this is secured to the more rigid body portion of the former 15 by the tap screws 28. On the inner sideof the flexible flexible nose'portion therefor, and means for flexnose portion 27 a bracket 29 is secured, which is provided with the pivot pin 31 as shown, and near the lower end of the rigid upper portion of the former 15, a fulcrum bracket 32 is secured thereto and this is provided with a fulcrum pin 33.

25 a Another pivot pin 34 is provided to pivotally-connect theupper end of the lever 35, to the inner end of the adjusting rod 36 the rear end of which is screw-threaded and provided with an adjusting nut 3'7 and a jam nut 38 in order to move and position it with respect to the carriage 1'7. Bearing blocks 39 and 41 are mounted on the base frame 11 and carry the rotatableshafts 42 and 44 on which are respectively mounted the undriven bending rollers 43and 45.

Having thus given a description of the mechanism, a rsum of its mode of operation will be of interest.

The drag roller 24 is driven by any suitable source'of power and the web W is advanced by it, whereupon it passes over the former 15 which forms the initial fold. This running web W may be composed of any number of plies orthicknesses and, as it passes over the flexible nose 27, this nose, by reason of its thinness and manner of support is adapted to flex and accommodate itself to the movement of the web and to the forces thereby applied to it. The nose portion 27 is preferably formed from an integral steel plate which is inherently and elastically flexible.

In order to arrange the adjustable nose to the best advantage, it may be less curved when a web composed of a large number of plies 'is being initially folded and may have a greater curvature when a thinner multiple web is being folded. This adjustment is made mechanically by moving the adjusting rod 36 longitudinally either backward or forward'and securing it in the position desired by means of the adjusting nut 37 and the jam nut38 and this may be done either before the operation begins or if found necessary the conformation of the nose can be adjusted while the web is running in order to produce the best results. It has been found that a thin multiple web wil run without difficulty over a nose of greater'cur- -vature, while a thicker web or one of more plies 3 ducing the desired curvature in the nose, it should be noted that its outer end portion overhangs the bracket 29 to a certain extent in the form of a projection or cantilever, and as this is elastically flexible it will yield to any irregularities of and to b any excess or deficiency of pressure applied to it by the running web, so that its end portion automatically adjusts itself in accordance with the work to be performed.

It will be understood that the invention may be embodied in other specific forms without departing from thespirit or essential attributes thereof, and it is therefore desired that the present embodiment be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention. I

WhatI claim is:

-' 1. A formerfor a'running web, said former being equipped with a flexible nose portion, and .means'for -adjusting the curvature of said nose portion. v I

2. In a former for a running web, an elastically ing Said nose portion to just the curvature thereof. a j b 3. In a former for a running web; a flexible nose secured thereto, and means for adjusting the.

curvature of that portion of the nose adjacent to the former.

4. In a former for a running web, an inherently flexible nose secured thereto, and means for flexing said nose relatively to said former.

5. In a former for a running web, an inherently flexible nose secured thereto, and means acting upon the intermediate portion of said nose adapted to bend it relatively to .said former.

6. In a former for a running web, an inherently flexible nose portion secured thereto, means act-.

ing upon the intermediate portion of said nose adapted to flexit relatively tosaid former, the

outer end of said'nose projecting beyond said means and adapted to bend in proportion to the forces applied thereto by said web.

7; The combination with a running web, of a former adapted to initially fold it, an inherently flexible nose secured to the delivery end of said former, means for positioning the portion of said nose adjacent the former, said nose having an rower portion extending unsupportedly therefrom Y and adapted to flex in proportion to the pressures applied to it by the running web.

10. In a mechanism of the character described, a former, an inherently flexible nose portion secured thereto, a lever secured to said nose, and means for rocking and securing said lever, whereby said nose is flexed as desired.

11. In a mechanism of the character described, a former, an inherently flexible nose the inner end of which is secured to said former, a lever, one end of which is pivoted to said nose with its central portion fulcrumed on the former, and means for rocking and securing said lever, whereby the nose is flexed as desired.

12. In a mechanism of the character described;

a former, an inherently flexible nose secured thereto and projecting therefrom, a lever fulcru med on said former with one end pivoted to 14. A former of the character described comprising in combination, a body portion, elastic means attached to said body portion, means for moving said body portion and elastic means in unison, and means for adjusting the elastic means independently of said body portion.

WILLIAM J. STRAIN.

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