US1740757A

US1740757A - Crock-making mold

Info

Publication number: US1740757A
Application number: US221172A
Authority: US
Inventors: Granville G Westerfield
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-09-22
Filing date: 1927-09-22
Publication date: 1929-12-24
Anticipated expiration: 1946-12-24

Description

Dec. 24, 1929. G. G. wEs'rERFn-:LD 1,740,757

CROCK MAKING MOLD Filed Sept.. 22, 1927 2 Sheets-Sheet l 61H01 new Dec. 24, 1929. G. G. wEsTx-:RFu-:LD v 1,740,757

CROCK MAKING MOLD Filed Sept. 22, 1927 2 Sheets-Shee 2 i /8 la 1255.5 I

Patented Dec. 24, 1929 UNITED STATES TENT OFFICE CROCK-MAKING- MOLD Application filed September 22, 1927. Serial No. 221,172.

My invention is concerned with the manufacture of earthenware jars provided with laterally projecting lugs or ears to which a handle or bail may be attached. Such jars are usually made in hollow rotating dies into which the material for the jars is placed and spread over the interior surface of the die as it rotates. Dies of which I have previously been aware are usually unitary structures; and the jar after it has been shaped as desired is withdrawn from the die by axial movement. The jar, after Withdrawal from the die, is placed upon a rotating table and the upper edge of the jar is finished to the desired shape as the jar rotates.

After the jar has dried for a time, the bailears or lugs are attached to it. These bailears are formed in separate molds and are provided with holes, usually extending through them from end to end, to receive the ends of the wire forming the bail. After being thus formed, the bail-ears are attached to the jar by wetting the engaging faces of each ear and the j ar and pressing the ear into place against the outer wall of the jar.

Jars so constructed have the disadvantage that the union between the material of the bail-ear and that of the ar is very frequently faulty with the result that ears frequently break oft in use. A further disadvantage of such jars is that bail-ears for jars of various diameters are usually made in the same mold; and when the ear is attached to the jar it is curved more or less to conform to the curvature of the jar, thus deforming the ear and distorting the hole which extends through it. Again, the bail-ears when attached to the ar are frequently inaccurately located, with the result that the jar will tip .whenv lifted by the bails. J ars with ears formed integral with the jar body have been made in unitary dies by locating the ear at the extreme top of the jar where it will not interfere with withdrawal of the jar from the die. Because of the necessity of providing draft on the ear, the' shape of the ear is limited to an undesirable form; and, further, the presence of the ear at the top of the jar interferes with the iin- 50 ishing of the top of the jar.

Among the objects of my invention are to produce a jar in which the bail-ears will be formed integral and simultaneously with the jar body; to provide a jar below the top edge of the jar they Will not interfere with top edge; to locate the ears diametrically opposite points;

with ears located in order that finishing such accurately at to provide a jar in which the ear may have a pleasing shape not limited by the necessity of providing draft to permit aXial withdrawal of the jar; to decrease the cost of manufacture of jars; and to provide bail-ears distorted by which are not the necessity of changing their shape to conform to the curvature of the jar and Wall.

I accomplish the above obje cts by providing a die having a central cavity for forming the body of the jar and cavities or recesses for forming the bail-ears, the last named cavities being located in ear molds which relatively to the body of the die parts illu Figs. 3 and 4 are horizont are movable 1n order to the ear by latdrawings illustrate my fragmental elevation yof the ear molds in place;

strated in Fig. al sections respectively on lines 3 3 and Aka of Fig. l; Fig. 5 is a fragmental vertical section through the die showing a portion of the jar formed therein; Fig. 6 is a section similar to Fig. 5

but with the jar removed from the die and the ear mold withdrawn from occupies while the 7 is an interior view of the die the position it jar is being formed; Fig.

and ear mold;

Fig. 8 is a fragmental perspective view of the die-body showing how it is cut out to provide for the mounting of the ear mold; and Fig. 9 is an` elevation of the jar made in accordance with my invention.

A jar made in accordance with my invention comprises a jar-body l0,

usually cylindrical in form, provided at diametrically opposite points with bail-ears 1l has extending through it a h reception of the ends of the bai To strengthen the upper edge each of which ole l2 for the l (not shown).

of the jar and to prevent breakage, it is desirably thickened to provide a circumferential iange 13.

To form such a jar I provide a hollow cylindrical die 15, the cavity in which conforms generally to the shape of the exterior surface of the jar body 10. At diametrically opposite points on the die body and at the top thereof are cut openings, the walls of which, as illustrated in Fig. 8, have rabbet grooves for the reception of a U-shaped bracket 16 conveniently attached to the die body by means of screws 17. lt is in such brackets that the removable ear molds about to be described are located.

Each of the ear molds 18 is desirably pivotally attached to its associated bracket 16 by means of a bolt 19 which extends through overlapping ears 2() and 21 carried respectively -by the bracket and mold. In its inner face, each of-the ear molds 18 is provided with a;recess.25 which forms an ear on the mold jar.V

Except for the recess 25, the inner vsurface ofthe mold I18 is continuous with the inner surface of the die body 15.

At points opposite the ends ofthe recess 25, the bracket 16 is provided with enlarged portions 26 through which extend alined holes 27 for the reception of sleeves .28, such sleeves being adapted to be moved into engagement with holes 29 in the ear mold 18 to hold such ear mold in place while the jar Ais being formed. Desirably, the holes l29 extend through the wall of themold -18 at the ends of ithe recess 25, and the inner ends of the sleeves 28 are made conical in form to project into the recess to form depressions inthe ends of the vbail ear. -I have found it convenient to providezeach of the sleeves 28 with a helical cam slot 31 adapted to receive the `end of a screw 32 mounted in the bracket 16. Bygt-his means, the sleeves 28 vmay be rotated to cause their engagement with or disengagement fromtheear mold 18. To facilitate rotation ofthe sleeves-28, they may be provided with laterally projecting handles 33.

To lform the hole through each ofthe 'bailears, I employ a :rod 35, which is desirably provided at one'end with a `point and at the other end with a knob v36. This rod 35 is adapted to pass -through alined holes in the sleeves 28 to'form a hole extending lfromone end .to the other of the bail-ear 1.1.

Although not essential, I may provide near the .upper end of theear-mold 18'an eye or ring 38 of such a diameter that the rod35 may be inserted therethrough as shown in dotted lines in Figs. 5 and 6 to facilitate opening of the ear-mold.

In using my die, it is so mounted that it is rotatable labout .a vertical axis as are other types of dies used in the manufacture Aof earthenware jars. VVhen a. jar is to be made, the ear molds 18 are placed in the position shown in Figs. land 5 and are secured'insuc'h position by rotation ofthe sleevesf28 'to rthe lthe ears.

full-line position shown in Fig. 1. The rod 35, at this time, is removed. The material from which the jar is to be made is placed in the rotating die and spread against the walls thereof as by means of the usual roller. By this action, the material is forced into the recess 25-of thefear molds 18, such earmolds desirably being .provided with vents 18 which serve to prevent the formation of air pockets. After the material is spread as desired 'over -the inner vsurface of the die, the die isbrought to rest and the rods 35 forced through lthe sleeves 28 to form holes through After this operation, the rods are withdrawn, the sleeves 28 rotated to the dott-ed line position-shown in rFig. 1, andthe ear Amolds withdrawn to the .position shown in Fig-6. The completed `jar l'ma-y nowlberemoved from the Vmold :and `finished as `desired.

A jar made yin'accorelance ywith the `process describedabove has an advantage-over other jars of which :I am aware infthat the bail-earv being formed integrally -Awith the bod-y of the jar will remain in place thereon under'conditions which would .result inthe separation from the body :of ears :which have been -attached tothe jar after-the j ar was fformedian'd have been imperfectly -united with :the jar body. Further, the completion of the 'jar together with both the bail ears-atonehandling eects a material-reduction in 'the cost of manufacture. 'Thebail ears areallofzthe same shape, since they .are not deformed vby attachment to .the v jar in ;a subsequent v opera tion, and they are-accurately located at diametrically opposite point-s on the jar, vthus insuring that the jar will lnotbe-out ofbalance whenilifted by the-hails.

My mold and process .make .it possible to form on the j ar ear letters, .'figures, `or-symbols, the presence fof which onthe year `not only serves tto identify the manufacture but also serves :as evidence thatfthe ear was formed integral with the iar; for, if kany attempt were made to mark similarlyl ears formed-separately 'andthen :stuck :on the jar, the identifying markings would' ibe 'badly distorted and marred if not completely idestroyed :inthe process-of attaching 4the ear to thejar. Identifying markings suchlas .I Ycontemplate are formed inthe bot-tomofthelear mold recess as :shown in Fig. j7, .and may either be raised from `.the 'recess 'wall to produce sunken markings on the ear or formed by depressions 5to produce :raised lmarkings on the ear. d

I claim as my invention.:

1. A die for use informing molded jars having one Yor more bail-ears, Vcomprising a hollow body, an .ear-mold arranged 'to-'be mounted on said body :and having a recess adapted to form an-outwardly'proj ecting ear on the m'oldedjar, members fmova'bly mounted on said body adjacent k'the ends ref fsaid ear mold, said ear mold being provided. with openings in its ends adapted to receive said members to hold the ear mold in place on said body, said members being arranged when in place in said openings to project into the mold recess to torni depressions in the ends of the molded ear, each of said members being provided with a helical cam slot, an abutment on said body arranged to co-operate with the cam slot in each of said membe s to cause said members to move into and out oir' engagement with said mold as they are rotated, said members being provided with alined openings, and a rod insertable through said openings to form ahole in the molded ear.

2. A die for use in forming molded having one or more bail-ears, comprising a hollow body, an ear-mold arranged to be mounted on said body and having a recess adapted to form an outwardly projecting ear on the molded jar, members movably mounted on said body adjacent the ends of said ear mold, said ear mold being provided with openings in its ends adapted to receive said members to hold the ear mold in place on said body, said members being arranged when in place in said openings to project into the mold recess to form depressions in the ends of the molded ear, each of said members being provided with a helical cam slot, and an abutment on said body arranged to co-ooerate with the cam slot in each oft' said mem ers to cause said members to move into and out or" engagement with said mold as they are rotated.

3. A die for use in forming molded jars having one or more bail-ears, comprising a hollow body, an ear-mold arranged to be mounted on said body and having a recess adapted to form an outwardly projecting ear on the molded jar, and members movably mounted on said body adjacent the ends of said ear mold, said ear mold being provided with openings in its ends adapted to receive said members to hold the ear mold in place on said body, said members being arranged when in place in said openings to project into the mold recess to form depressions in the ends of the molded ear.

4. A die for use in forming molded j arshaving one or more bail-ears, comprising a hollow body, an ear-mold arranged to be mounted on said body and having a recess adapted to form an outwardly projecting ear on the molded jar, and members movably mounted on said body adjacent the ends of said ear mold, said ear mold being provided with openings in its ends adapted to receive said members to hold the ear mold in place on said body.

5. A die for use in forming molded jars having one or more bail-ears, comprising a hollow body, an ear-mold arranged to be mounted on said body and having a recess jars adapted to form an outwardly projectingear on the molded jar, members movably mounted on said body adjacent the ends of said ear mold, said ear mold being provided with openings in its ends adapted to receive said members to hold the ear mold in place on said body, said members being arranged when in place in said openings to project into the mold recess to form depressions in the ends of the molded ear, said members being provided with alined openings, and a rod insertable thro-ugh said openings to form a hole in the molded ear.

6. A die for use in forming molded jars having one or more bail-ears, comprising a hollow body, an ear-mold arranged to be mounted on said body and having a recess adapted to form an outwardly projecting ear on the molded jar, members movably mounted on said body adjacent the ends of said ear mold, said ear mold being provided with openings in its ends adapted to receive said members to hold the ear mold in place on said body, each of said members being provided with a helical cam slot, an abutment on said body arranged to co-operate with the cam slot in each of said members to cause said mem` bers to move into and out of engagement with said mold as they are rotated, said meinbers being provided with alined openings, and a rod insertable through said openings to form a hole in the molded ear.

.1'. A die for use in forming molded jars having one or more bail-ears, comprising a hollow body, an ear-mold arranged to be mounted on said body and having a recess adapted to form an outwardly projecting ear on the molded jar, members movably mounted on said body adjacent the ends of said ear mold, said ear mold being provided with openings in its ends adapted to receive said members to hold the ear mold in place on said body, said members being provided with alined openings, and a rod insertable through said openings to form a hole in the molded ear.

8. A die for use in forming molded jars having one or more bail-ears, comprising a hollow body, an ear-mold arranged to be mounted o-n said body and having a recess adapted to form an outwardly projecting ear on the molded jar, members movably mounted on said body adjacent the ends or' said ear mold, said ear mold being provided with openings in its ends adapted to receive said members to hold the ear mold in place on said body, each of said members being' provided with a helical cam slot, and an abutment on said body arranged to co-operate with the cam slot in each oi said members to cause said members to move into and out of engagement with said mold as they are rotated.

9. A die for use in forming molded jars having one or more bail-ears,

comprising a hollow body, an ear-mold arranged to be mounted lon .said 'body and having a -recess adapted to term anoutwardly projecting ear on the'molded jar, releasable meansfor holdiug'said ear mold in ,place'on said body, said ear'moldfheing provided with openings in its ends,and a rod.insertible-throngh said openings to torm ahole inthe molded ear.

-10. A die for use in forming molded vjars having oneor more bailears, comprising a hollow body., an ear-mold arranged to be mounted :on said body and having a recess adapted to form an outwardly projecting ear on the ,molded jar-,said ear mold being provided withropeningsinits ends, and a rod .insertable through said openings to form a hole in the molded ear.

11. Afdie foruse in forming molded jars having one or more bail-ears, comprising a hollow body, an ear-mold arranged to be mounted on said body and having a recess adaptedito rform an outwardly projecting ear on .the vmolded'jar-,rand releasable means for holding-'said ear mold in place on said body.

.12.. A die rior .use in forming .molded jars having one or more bail-ears, comprising a hollow body, and an earanold arranged to be removably mounted on said body and having a vrecessiadapted to form an outwardly projecting ear on Tthe molded jar.

13. .Aidie for Ause in forming molded jars having one or more bail-ears, comprising a hollow body, ancear-mold arranged to be mounted on said fbody and having a recess adaptedfto'form ari-outwardly projecting ear on the -molded jar,said ear mold being provided with an opening .in itsend, and a rod insertable through said .opening to orm a hole .in the .molded ear.

14:. A .die for'forming the ears ofmolded jars, said .die comprising a body having a cavity adapted to form the ear, members mounted in said body at the ends of said cavityand movable to and from a position in which they project intesa-id cavity, said members being provided with alined openings, and a rod'insertable through said openings to forma :hole through the moldedear.

15. A die for forming the ears of molded jars, V,said die comprising a body having a cavity adapted to form the ear, a member mounted in said body at one end of said cavity and movable to and from aposition in which it projects into said cavity, said member being provided with an opening,and a rod insertable through said opening to orma'hole through the molded ear.

1. A die asset i'orth in yclaim 14 with the addition that each of said members is provided with a helical cam slot, and an abutment on said body arranged to (Jo-operate with the cam slot in each of said members to cause said members to move into and out ofthe moldcavity'as they are rotated.

'1.7. Adie as set-.forth in claim 15 with the GRANVILLE G. VESTERFIELD.