US993555A - Method of fire-polishing glassware. - Google Patents

Description

A. J. SANFORD.

METHOD 0F FIRE POLISHING GLASSWARB.

APPLICATION FILED JUNE 2G, 1909.

Patented May 30, 1911.

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APPLIUATION IvILED JUNE 26, 19'09.

Patented May 30, 1911.

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fi fi UNlTED STATES ANDREW J'. SANFORD, OF NEWARK, OHIO,

PATENT NEWARK, OHIO, ACORPOBATION 0F` WEST VIRGINIA.

Application tiled June 26, 1909. Serial No. 504,553.

To all who/m 'it ma/y concern:

Be it known that I, ANDREW J. SANFORD, a resident of Newark, inthe county of Licking and State of Ohio, have invented a new and useful Improvement in Methods ot' Fire- Polishing Glassware; and I do hereby declare the following to be a ttull,v clear, and exact description thereof.

My invention relates to the lire polishing of glassware and more particularly to the fire polishing of flat articles or articles having flat body portions with shallow upwardly projecting rims or sides, .its object being to provide for the lire polishing of both the top and ybottom faces of these arf ticles, the invention being of the same general nature as that described `in an application filed by Ine of even date herewitlnSerial No. "504,552,

It consists, generally stated, in supporting the article upon a suitable former and tirst exposing the top surface thereof to a downwardly projecting fire polishin Haine, and then reversing the article and ire polishing the bottom `face thereof.

It also consists in tire polishing such articles having flat body portions while so supporting the entire flat body portion and thereby preventing the sagging or stretching of the mid-portion ot' the t'lat body.

It also consists in so lire polishing the top face of articles having upwardly projecting rims and at the saine time rotating the articles so as to flare the rini portion outwardly, and' then supporting the blanh with its bottoni face upward upon a 'former corresponding to the exact shape ot' the interior of the finished article and by the heat of the flame causing the rim portion ot the article to conform to such outer portion ot' the former and produce an article of the exact shpe desired. t t also consists in certain other improvements as hereinafter set forth.

In the accompanying drawingsFigure bis a View of tire polishing apparatus suitable for the practice of the Iinvention; lti'g. 2 shows the article in position for tire polish- .ing the top face oi. a deep rimmed article;

Fig. 3 is a like view showing the saine article in position 'for fire polishing the bottoni tace thereof;'Figs. 4 and 5 are views illustrating the polishing of flat articles; and Figs. (i and Z illustrate the fire polishing of tlat articles with lovv rims to be changed in forni during tire polishing: v Y 4i The invention may be employed with any suitable apparatus, that illustrated 'in con;`

iiection rwith the invention being described 1n a companion application of even` date herewith, Serial, No. 504,554, the necessary;

parts of said apparatus for the practice of the invention being illustrated in the drawings. Said apparatus has the supporting roy tating shaft 1, on which the support ,or former 2 is centered and supported, suitable means lorrotating the saine being illusf,

trated, such for example as the, worin wheel 3 which in the raised position of the shaft eii-` gages with the worm Ll. VVor'ms and worin wheels of suitable size to give` the desired speed of rotation may be employed, torexample, in Figs, and 7 where a relatively low speed of rotation is desired the worniis` of small diameter and being employed with a worm wheel. ofrelatively larger diameter, while in Fig. the supporting shaft 2 car-` ries a worm wheel 3 of larger dianietermesh-- OFFICE AssIGNoR To A. HHEISEY & co., me., or*

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vburner t3, said burner haviiig the mixing.

chamber 7 and below the saine the burner, 8 which may be `a [lat faced burner having inultitudinous perforations or oriticesfex-` tending through the jet face thereof so as ,to provide multitudinous small flame jets on the outer faces of the burner, projecting downward troni the same and directly upon the article l0 to be polished as shown in` Figs. l, 5 and 7, or may lyave a central flat faced projection as in Figs. 2 and (3, or such burner with a surrounding api'on as in Fig.

In Itigs. .1, 2, 3, (i and T I have illustrated burners and apparatus suitable Vfor the fire polishing of flat articles with rim portions. or sides, wliilc-in lt`igs. 4. and .3 I haveillnstrat'cd the tire polishing ot' tiat articles. 'llic gas and air entering within the mixing chamber is .thorouglily mixed and forced under pressure through the perloi'atioiis of theburner and plays over the surface of the4 articles as above stated. The burners may either have a flat jet face, as shown in Figs. t and 5, or may conform to the shape of the articlehaving the central projection 11 entering within the article as 1n Fig. 2, or

g esatta an annular projection or apron 12 having the jet-orices on the inner face of the `same in addition to the jet orifices on the inner flat portion 13, as illustrated in Fig. 3..

In the fire polishing of articles having flat body portionsas heretofore practiced, difficulty has been iperienced on account of the sagging of the flat body either inthe center portion if that is overheated, or of the outer portion if that is overheated,when such flat body is Anot supported during reheating.`

This resultsI in -the formation of a wavy body in the portion where. the metal has stretched in sagging, and no way to overcome such stretching' of the body while preserving the rim portion in proper position is known. I therefore employ a supporting former 14 corresponding to the under face' of the flat article so as to give support t'o the entire flat body of the same in connection with the first fire polishing step, as shown in Figi 4, and for the subsequent fire polishing ofthe under face I employ a like then transferred to a support conforming to said top face, and the'bottom face of the same is fire polished. In this operation all liability of the stretching or sagging of the metal during` the fire polishing or the marring of such top face is prevented and it is fire polished while held in practically perfect shape.

In the lire polishing of blanks or articles having flat bodies and upwardly projecting rim portions, it is preferred that the jet orifices shall extend out on the apron 16 of the burner above the rim portion 17 of the blank, suoli as beyond the central projection illustrated in Figgg. "Wherethe riniof the articleis to be maintained in the same shape as originally pressed the supporting former is made corresponding in shape, having the flat body portion 18 and'the u wardly pro-4 jecting lip 19 to sup ort the rlm 17 of the article, it being pre erred that the rim of thel blank shall project slightly above the lip 18 of the former so as to be fully eX- posed to the .melting influence of the flame to remove mold marks and round off thev corners of such edge portion. After such lire polishing the blank is inverted and .placed upon a former conforming to thein-` side of the vblankvand in this position is ex- Where it is desired to change t-he shape of the rim portion of the article such as to transfera rim pressed practically straight in the mold to a greater flare I prefer to proceed as illustrated in Figs. and 7. The supporting former 20' of Fig. 6 conforms to the bottom of the flat article so as to iveproper support'thereto and has lexten ing out therefrom a fiaring lip portion, as at21,

and the article is placed `therein with its top side upward and so exposed to the fire polishing flame jets, which in `addition to removing the imperfections of the flat portion of the blank and melting the corner edges of the upwardly projecting rim portion 22, reheat that rimportion it flexible so that by rotating the former such lip portion is thrown out by centrifugal action against thel flaring lip portion 21 of the former. It may not, however, properly conform thereto and in fire polishingthe bottom ofthe blank I employ a former such as shown inFig. 7, having the flat body portion 23 to support the flat portion of the blank and, havin annular face portlon 24 corresponding to the exact inner shape of the rim portion vwhen finished, and the blank is exposed' to the downwardly projected heating flame of the burner, in which case the rim portion 22 of the blank is heated'to a sulicient degree of plasticity to settle down and conform exactly to the former on which it is sup- Aported. In carrying out this operation I Vprefer to rotate the blank at a relatively high speed in fire polishing the top face thereof to obtain the centrifugal action to' throw out the rim portion of the blank, and. to rotate the blank at a relatively slow speed in fire polishing the bottom face so that the blank will naturally settle down upon the. former and be brought exactly to the desired shape. In any of the fire polishing treatments above described the flat portion of the blank is Vroperly supported So that there'is no possibility of its sagging out of shape and the article produced has an absoan outwardly extending by a downwardly directed heating flame sufficiently to render lutely flat body portion conforming exactly tothe supporting former. y

The above advantages are obtained where mented, such as' indicated in Figs'. 4 and 5, the further advantages lare obtamed in the fact that by first fire polishing the upper surface which is usuall smooth in this class'of Vaifclesand. then. re polishing the lower -even though the projections forming the or namentation on the bottom surface 'of thethe articles fire polished are either plain or ornamented. Where their surfaces are ornaf in form of the same on account of the so ness of the metal while under fire polishing, and holdsthe previously fire polished upper face in perfect condition. It may be so supported until it is cooled and set. If the or* -I namented bottom face were first fire polished and th'e plain upper face subsequently fire polished'both would be liable to injury or spoiling by theA sagging of the metal within the depressions between the projecting portions of the ornamentation. 'y

What I claim is: y 1. The herein described method of lire polishing glassware having flat body portions provided with ornamented bottoni faces, consisting in first supporting the blank with its top face upward and fire polishing the same by a', downwardly directed flame, and then 'supporting the blank with its ornamented bottom face upward and fire polishing said surface with a downwardly projecting flame.

2. The herein described method Aof fire polishing glassware having flat body Aporltions with upwardly projecting rims, consisting in ho ding the blank on a support conforming to the flat portion of the blank and with its rim portion projecting upward, and fire polishing the to face thereof by a downwardly projecting ame, and then vreversing the blank and holding it on a su port conformin yto the interior thereof and fire polishing gie bowl thereof by a downwardly projecting flame. 4

43. The herein 4 described method of re polishing'glassware havinga flat body portion and upwardly projecting rim, consistwith its top edges exposed, and fire ing in holding the blank on a support conforming to the flat bottom portion thereof v and with its rim extending upwardly and with its edge portion exposed, and fire polishing the blank by a downward projecting flame while rotating the blank Jto expand the rim ortion by centrifugal action, and then holding the blank on a support conforming to the shape of the interior of the finished article and fire polishing the bottom portion of the blank and shaping the rim portion thereof.

4. The herein described method of fire polishing glassware having a flat body portion and an upwardly projecting rim,con

sistiiig in holding the blank on a supportl 'conforming to the flat bottom portion thereof and with its rim extending upwardly and with its edge portion exposed, `fire polishing the blank by a downwardly projecting llaine while rotatingtlie blank at a relatively highspeed to expand the rim poi'- tion by centrifugal action, and then holding the blank on a support conforming to the .shape of the interior of the nished article and fire polishing the bottom portion of the blank and shaping the rim portion thereof whil rotating the saine at a relatively slow spee 5. The herein described method of fire polishing glassware having flat body poi'- tiOiis with upwardly projecting rims, consisting in holding' the blank on its support conforming to the flat body portion and ishing the top faces of the blank by projecting multitudinous jet flames downwardly against the flat body portion and outwardly 4against the rim portion and downwardly upon the edge portions thereof.

In testimony whereof, I the said ANDREW J. SANFORD have hereunto set my hand.

ANDREW J.V SANFORD.

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