US2119496A - Apparatus for making latex articles - Google Patents

Description

May 31, 193s. A N, SPNEL 2,119,496

APPARATUS FOR MAKING LATEX ARTICLES Filed May 8, 1936 INVENTOR /KB RAHAM MSPANEL BY Patented May 31,1938 Y 2,119,496

UNITED-[STATES 'PATENT oFFicE APPARATUS'FOR MAKING LATEX ARTICLES Abraham N; Spnel, Rochester, N. Y. ApplicationY May 8, 1936, Serial No. 78,593

" s'claims. (C1. 18-41) 'Ihisinventionairelates' tov apparatus for makwith layers` of latex thereon particularly illusing-latex articles.Y j trating a modified type of reinforcement-'gen- Infthef manufactureY of` latex articles, it Vhas erating means for a margin of the article. been the practiceftomakevsuch' articles by dip- The present invention can be rapplied to the 5 ping aai'suitably shaped form `into liquid latex making of. latex bibs or aprons by using the `form 5 Withthe-major vaxis of the form 'in a vertical 20 illustrated in Figs. l to 4 inclusive. This form position;A This practice of 'dipping the'form with is made from metal sheet 2| of commercial stock itsv long axis extending verticallyhas .been folsuch as stainless steel or aluminum cut to the lowed; because it was' believedy to be necessary general outline illustrated in Fig. 1.. The upper '10 irl-'order to generate satisfactory reinforcements portion of the form proper is provided with` an v10 for al1 margins of the article. In the dipping extension 22 (Fig. 2) by which the form can be ofxsuchfo'rms, it /is necessary tointroduce the supported while latex is being vdeposited thereon. form slowly into the latex bath so that the bath On each face of this extension there is attached isnotedisturbedftofthe'pointwhere air bubbles av plate 23 terminatingat its lower'. portion in lll-'Will developon .the surface thereof, 'and it is also an abrupt edge 24, this abrupt edge being posi- A15 necessary-to"Withdrawtheform slowly from the tioned in alinementwith the upper edge of the latex-bathso-that'a'uniform layer oflatex will form pr0per- The top, bott-,0m and 1eft end maybef-depbsitedfthereonz- Consequently. Where a gin ofthe sheet 2|, as illustrated in Fig. 1 from necessarily long `form lisused formaking capes the point 24 to the point 25 has a groove 26,

or full length aprons.' the'lengthof time Ierolled or otherwise formed therein at'the edge k20 Vquired 'forbthe-fo'rm to be dipped into and withof the sheet as best illustrated in Figs. 2 and 3. drawn fromthe latex bath'becom'es so great that On the right end portion of each surface of the the costlof making the article becomes excesformas illustrated in Fig. 1, there is secured a sively high.- AlsoV theI length of time required projecting knife edge 27 Which'denes the `inside 25 for each dip is so vlong that the exposed latex edges of the tierstrings of the resulting bib, the v25 at the surface'- offthe latex bath vhas an opuupper portion of the bib and the neck opening portunity to coagulate forming a highly objectherein. This knife edge is bent to thedesired tionable lm"orskin on the bath surface. shape` and is attached to eaclr surface :of-*the I have discovered that the cost of producing right end of the form as shown in Fig. 1, from 30 relatively long narrow latex articles can be sub-A the point 24 to the point 25. Circular bosses 30 stantially reduced by dipping the article-gen- 28 with abrupt edges are attached to each surerating form With its major axis in approxiface of the sheet at those points where it is demately a horizontal position and yet a satisfacsired to develop button holes in the resulting tory latex article with all of its margins reinbib. forced, can be produced. In making bibs on this form, the form with 35 The main feature of the invention relates to its long axis in a substantially horizontal posinovel forms whereby relatively lons. narrow latex tion is supported from the extension 22 of the articles can be produced With a substantial saV- form. While suspended in this position, the form ing in cost. is dipped one or more times into a latex bath o Other features and advantages 0f the nVeIluntil a layer of latex 29 is deposited on each 40 tion will appear from the detailed description and surface of the form, At the junction 0f each claims when taken with the drawing in which plate 23 with the Surface 0f the form and at Fig. 1 is a front elevation of a form on which a the junction of each knife edge with the form, latex bib or apron can be deposited; Fig- 2 iS ridges of latex 30 will be developed, while at a section of this last-mentioned form taken on the abrupt edges of these plates and at the knife 45 the line 2-2 of Fig. 1; Fig. 3 is an enlarged edges, lines of weakness will develop in the refragmentary section taken on the line 3-3 of sulting layer. Similarly, latex will accumulate Fig. 1 of a marginal portion of the form With a as a reinforcement 3| (Fig. 4) at the junction layer of latex thereon illustrating the character 0f each boss 28 with the sheet 2|. The latex 0f reinforcement developed Hear each edge 0f will also accumulate on thesurface of the grooves 50 the layer; Fig- 4 iS an enlarged section of this to develop reinforcements 32 and 33 of the charform with a layer of latex on each surface thereacter illustrated in Fig. 3. The excess portion of the section being taken on the line 4 4 of of the latex on the plates 23 can be stripped Fig. 1; and Fig. 5 is a fragmentary cross secaway as far as the abrupt edges 24 of the plates tional view, similar to Fig. 3, of a modified form and the excess portion of the latex layer de- 55 posited on the ends onthe areas 33,', 34f

.of the bosses 28,' as well as and-35 at the right of the knife edge as illustrated in Fig. l, can betorn away. At the abrupt edges 34 of the sheet, lines of weakness Ywill'develop in the latex Vlayer so that by parting the layer ofV latex at these lines of weakness-two aprons simultaneously deposited on theopposite surfaces of the form will result. Since thel length of the form is lmaterially greater than its width, it will Vbe appreciated that there is a material saving of time vby dipping this form with its major axis in a horizontal position and yet by, the present method an apron of uniform thickness and reinforced at all its margins can be made. VInstead of using forms provided withV rein- Y forcement-generating means illustrated in Figs.

1 andjfl, the entire margin of the sheet 2IA" comprising the form may have a groove 36 formed therein as illustrated in the fragmentary sectional View Fig. 5. It willbe noted from a comparison of Figs. 4 and'5r that -the characterV of the marginal reinforcement of the latex Vgarment`29al will be modified'as the spacing between the groove and the adjacent edge of the sheet is Varied. J

The articles may be made of liquid latex, vulcanized after drying or may be made ofliquid latex largely vulcanized in its liquid form; the coagulation may be effected by straight dipping and drying or bythe acid coagulation method, ori-in fact, by any of the-methods known in the art. Y Y

The present disclosure of example and it will be understood that there can be many modifications and variations therein Within therscope of the appended claims without departing from the spirit of the present invention.

vWhat I claim:

V1. A form for making relatively long, narrow articles with reinforced marginscomprising an elongated sheet of material, said sheet having an article reinforcement-generating groove along a substantial portion of theV margin of one surface of said sheet and a projection on the other surface of said sheet opposite said groove, and means for supporting said sheet with itsY long is given merely by wayV axis in substantially a horizontal position while a suitable article forming coating is being deposited thereon. Y2. A form on which an article-forming coating may be deposited, comprising a sheet of material, said sheet having an article reinforce- .Y

ment-generating groove Vin one surface thereof,

and a projection on the other surface of said sheet opposite said groove-.,-

y3. A form on which an article-.forming coating maybe deposited, comprising a Vsheet of material, said sheet having an article reinforce- Y ment-generating groove along a margin of one surface of lsaid sheet, said groove at one side thereof terminating in the edge of said sheet, and

a projection on the other surface of said sheetV opposite said groove. Y

4. A form on which an article-forming coatingV may be deposited, comprising a sheet' off` material, an article reinforcement-generating groove in one surface' of saidsheet adjacent? an edge thereof, said groove being spaced from-"said edgeQand a projection on the-otherV surface of said sheetropposite -said groove.- Y

5. Avform onwhich an article-forming coating maybe deposited,'comprising a sheet of marol terial, said sheet having an abrupt edge,v meansY face, a projectionV on the other surface of said sheet opposite said groove for accumulating a 4reinforcement adjacent the edge of a` portion of the article depositedron said other surface, anda raised section on said first-mentioned .surface defining-the outline of a portion of the article'de.-

posited on said first-mentioned surface.

ABRAHAM N., SPNLI

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