US2655766A - Dimpling apparatus and procedure for hollow parisons - Google Patents

Description

Oct. 20, '1953 J. R. HADEN DIMPLING APPARATUS AND PROCEDURE FOR HOLLOW PARISONS Filed NOV. 7, 1951 3 Sheets-Sheet l gulf- INVENTOR 2039,0/7 l?. Hader? y.. juan/L'MTIM Oct. 20, 1953 .1. R. HADEN 2,655,766

I DIMPLING APPARATUS AND PROCEDURE FOR HOLLOW PARISONS Filed NOV. '7, 1951 3 Sheets-Sheet 2 @306 @05 @WML/@hm J. R. HADEN Oct. 20, 1953 DIMPLING APPARATUS AND PROCEDURE FOR HOLLOW PARISONS Filed Nov. 7, 1951 3 Sheets-Sheet 3 Nm MIM mm Nm mm ww mw mmm ml/w mm vm www INVENTOR Josep/5 /P. Hao/en Patented Oct. 20, 1953 DIMPLING APPARATUS AND PROCEDURE FOR HOLLOW PARISONS Joseph R. Haden, MonongaliaI County, W. Va., assignor to Morgantown Glassware Guild, Inc., Morgantown, W. Va., a corporation of West Virginia Application November 1, 1951, Serial No. y,255,255

Claims.

This invention relates to the making of ware in the nature of glassware from vitreous or plastic materials. It relates particularly to the forming of good quality ware provided with dimples or outwardly-concave depressions in its side walls.

Prior to my present invention, it has been diicult to provide so-called pinch eiects or dimples that measure up to good quality standards in table or bar ware. At best, the operation has been very expensive, produces many rejects, and has resulted in non-uniform dimples, in a non-uniform spacing of the dimples, and in dimples having a somewhat planar, inwardly-declining, tablike entry portion that spoils the overall appearance effect and the symmetry of the design. It has been customary to produce such dimples by a hand operation employing a stick. This is time consuming and requires a highly skilled workman to obtain any semblance of accuracy. The danger of objectional distortion of the parison is always present.

If an attempt is made to produce dimples in a mold, a parting seam is also produced (a onepiece mold cannot be used). Thus, my invention pertains essentially to the dimpling of better quality ware such as is formed by a blowing operation effected in a one-piece mold. It should also be noted that accuracy becomes more and more important the smaller the size of the item or article to be provided.

After considerable work in this field, I have discovered a solution to the problem presented and have been able to simultaneously produce accurately spaced dimples of substantially fully symmetrical cone shape about the side walls of ware in such a manner as to substantially eliminate rejects.

An object of my invention has thus been to iind a solution of the problem presented.

Another object has been to determine the important factors involved in producing better dimple or pinch effects 'in glasses, goblets, stem- Ware, etc.

A further object has been to devise procedure and apparatus for carrying out the principles oi my invention.

A still further object has been to provide apparatus for simultaneously producing-,uniform dimples at a series of transversely spaced-apart locations about the wall of an article of ware and without causing undesired distortion or deformation of the ware.

These and many other objects will appear to those skilled in the art from' the following description of my invention.

2 In the drawings, Figure 1 is a side view in vertical elevation and partial section showing apparatus of my invention; in this figure, the dot and dash lines show a starting position of dimpling ngers and actuating mechanism therefor, while the full lines show their nal (substantially horizontal) position.

Figure 1A is a fragmental view in side elevation and partial section showing operating linkage of the apparatus of Figure 1 adjusted to provide vertically lower indentations or dimples.

Figure 1B is a fragmental view in side elevation and partial section showing a modied form of mold for use in the machine of Figure 1 to adapt it for dimpling a stemware parison.

Figures 2, 3, 4 and 5 are horizontal sections taken, respectively, along the lines II-II, III-III, IV-IV and V--V of Figure 1.

Figure 5A is a detail of studs shown in Figure 5.

Figure` 6 isa vertical end elevation taken along the line VI-VI of and on the same scale as Figure 8.

Figure '7 is an enlarged top plan detail of a dimpling finger of the apparatus of Figure 1.

Figure 8 is a side section taken along the line VIII-VIII of and on the same scale as Figure 7.

Figure 9 is an enlarged side elevation showing a carbon tip used with the finger of Figure 7; Figure 10 is an enlarged plug end View in elevation of the carbon tip. Y

' Figures 11 to 11D, inclusive, are somewhat diagrammatic views in vertical elevation (some being in partial section), illustrating operational steps employed in accordance with the principles of my invention. Y

As shown in Figures 11 to 11D, in carrying out my invention, I first blow-form a parison or halfsham shape 5 -having a relatively thinner bowl or side Wall portion 5a, al relatively heavierfor thickenedbottom wall end or base portion 5b and a moil top portion 5c. In this step, seeFigure 11, I employ a blow head 6whose pipe 6a is carried by a secured-on swing arm 1. A unitary blow Y mold 8 having a paste layer a is mounted on a table 9. When the parison 5 has reached a semiplastic condition (at about 2000" F. for soda, potash or lead glass), it is transferred by the blow head 6a. and swing arm 'l Ito a slip-on, relatively shalloW-bottom, positioning mold 28 of an apparatus of my invention, see Figure 11A. It'

will be noted that mold 28 has a paste layer a and that its height is slightly greater than the `thickness depth of the base or heel A5l'ofthe semiiinished shape orparison 5. At this time, see

38. The connector 31 fits over and is secured (as by welding) to an upper end of a verticallyextending operating rod member 39 that extends through and is slidably'reciprocal within a central opening a in the platform or lower (primary) table l5. The lower endy portion 39a of the operating rod member 39 is bifurcated to receive an intermediate portion of a strap-like, foot-actuated, lever member 40 and to which it is pivotally connected by a headed pivotpin 4I. A foot tread 42 is welded to extend transversely from the front end of the member 40 to move it downwardly about its opposite or back end. As shown in Figures 1 and 5, the back end of the lever member 40 is pivotally mounted on a cross rod 43 and fixed in position thereon by a pair of collars M and their set screws Ma. The Vcross rod 43 is, see Figure 5, welded at its ends within holes in and between the pair of back leg members I6.

A tension spring 45, at its upper end shackled to a stud I'Ib on the front leg member I1 and at its lower end through a hole 40a in theactuating lever member d normally urges the latter -upwardly to the dot and dashposition of Figure 1 against an upper stud stop I'Ic that is xed to and extends from a side of the front leg member I1. A lower stud stop Hd, mounted in a like manner, limits the maximum extension of the spring d5, the maximum actuation of the lever mechanism and thus, the maximum inward movement of the dimpling fingers 29 and their tip ends 3D with respect to side walls of the parison 5. The dot and dash lines of Figure 1 showing the starting and return positions of the appaf ratus parts while the full lines show their positions at the completion of the inward movement of the tip ends 30. It will be noted that the fingers 29 and their tip ends 30 are on a plane at right angles to the vertical or longitudinal axis of the parison 5 at the completion of such inward movement. 'I'his is also true when the point of vertical contact of the tip ends 30 is varied (see Figure 1A) to provide a different horizontal or transverse plane of contact with the sides of the parison 5 or 5" of Figure 1A.

The type of inward and outward movement of the ngers effects an insetting or dimpling operation that assures an absolute accuracy of the operation (which is essential in smaller sizes of hollow articles such as a whiskey glass) and dimples that are fully symmetrical. The dimples not only give a highly pleasing ornamental eiect, but provide positive finger grips for holding the article (which is particularly advantageous when the article bowl or side walls are wet with moisture or any liquid) It is important that the side walls of the hollow parison 5 be supported with a shape-retaining, but a non-attenuating tension while the dimpling operation is being effected. This is accomplished by resting its bottom on the shallow mold 28 and applying a slight tension to its moil 5c by means of the blow head 6. The weight of the bottom 5b of the parison is sufficient for this purpose. It is also important that the dimpling finger ends 30 move forwardly into and backwardly out of contact with respect to complete their inward movement or depression of the localized areas 5d of such side walls in a plane substantially parallel to or on such transverse'plane. What I claim is:

1. In an apparatus for dimpling a side wall portion of a semi-plastic hollow parison of Vitre- Ous-or plastic material .having a support standard and-an upper mold table, the combination of, a rod member operatively mounted on the standard to extend upwardly therefrom towards the mold table, a connector secured on an upper end portion of said rod member, links each pivotally mounted at one end on said connector, lever arms pivotally mounted intermediate their opposite end portions 0n the mold table to extend substantially vertically thereof, lower end Dortions of said lever arms being pivotally connected to the other ends of said links, dimpling fingers adjustably secured on upper end portions of said lever arms to extend'transverselyinwardly therefrom,l a bas-e mold mounted on the mold table to receive a base portion of a hollow parison therein, each of said dimpling fingers having a semi-spherical tip to be moved into a side-wall portion of the parison when it is positioned on said base mold, said dimpling fingers being secured on'sai'd lever arms to move forwardly Vin an arcuate path towards'said base mold into the side wall portion of the parison supported thereby to a final dimpling position with respect to the side wall portion of the parison, and means for actuating said rod member and said dimpling fingers through said links and lever arms to move said tip into and out of the side wall portion of the parison.

2.' In making an improved hollow dimpled article of vitreous or plastic material by utilizing a pressure finger having a semi-spherical tipped end and wherein the material has the characteristic of becoming plastic under heat application thereto, a method of the character shown and described which comp-rises, providing a hollow parison of the material in a hot semi-plastic condition, supporting the parison with its side wall under a positive shape-retaining tension and with its base wall within a base mold while forming a symmetrical and uniformly depressed area of limited extent in the side wall Aof the hot parison by: moving the tipped end of the pressure nger transversely-inwardly along an arc towards the longitudinal axis of the parison and into point contact with the side wall thereofv advancing the tipped end inwardly along such arc from the Contact point and expanding the contact point into a relatively small depressed and substantially symmetrical contacted varea about the tipped end, terminating such inward advance with the longitudinal axis of the tipped end at right angles to the longitudinal axis of the parison, and withdrawing the tipped end backwardly along such are and out of contact with the sidewall without deforming the relatively small and substantially symmetrically depressed area therein.

hollow parison having a relatively thin side wall j and a thickened base wall is provided and the` tipped end is moved into point leontaet with the relatively thin side wall and advanced alongthe aro in a direction towards the thickened base wall thereof.

5. In an apparatus of the character shown and described for making depressed substantialli7 symmetrical dimples of limited area withouttab like entry portions in a side wall of a hot semiplastiev hollow parison of vitreous or plastie ma,- terial which apparatus has a base mold to receive a base wall of the parisonL the combination of means to vertically support the parison along its longitudinal axis with its side wall under a positive shape-retaining tension and with its base Wall positioned Within the mold, at least one pressure nger having a semi-spherical tipped end, an actuating armoperatively oonneeted to said linger and having means holding it in a primary position at which it supports said :finger with its tipped end out of Contact with and extending in a transversely-inelirledv plane towards the side wall of the.y parison, lsaid actuating arm having means substantially. limiting Y its advance to na secondary position at which it supports said pressure finger with its tipped end pressed within the side Wall of the parison and on a transverse plane that is lat right angles to 8 the longitudinal axis oi the parisom means op eratively connected to said aetuating` arm and advancing said arm from its primary toI its, seeondary position to move the tipped end oi said pressurey fingery transverselydnwardly along an are; towards.. the,y longitudinal axis off the,- parison into point contact with its side Wall and along the are from the contactpoint into a relatively small depressed and substantially symmetrical area within the side Wall and said holding means withdrawing said. actuating arm outwardly from its. secondary to its primary position to move the tipped end of said` iinger4 transversely outwardly alongv the arc and out. .of the depressed area. within the. side wall, of. the parison. without deorming the relatively small depressedand substantially symmetrical area therein. Y

JQSEPH R HADEN,

References Cited in the Iile of this patent UNITED STATES. PATENTS.

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