US2553135A

US2553135A - Process and machine for vacuum bottle tubulating and piercing

Info

Publication number: US2553135A
Application number: US120105A
Authority: US
Inventors: Eisler Charles
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-10-07
Filing date: 1949-10-07
Publication date: 1951-05-15
Anticipated expiration: 1968-05-15

Description

May 15, 1951 Q ElSLER 2,553,135

PROCESS AND MACHINE FOR VACUUM BOTTLE TUBULATING AND PIERCING 3 Sheets-Sheet 1 Filed Oct. 7. 1949 INVEN TOR.

A T TORNEY May 15, 1951 c. EISLER PROCESS AND MACHINE FOR VACUUM BOTTLE TUBULATING AND PIERCING 3 Sheets-Shed 2 Filed Oct. 7. 1949 May 15, 1951 c. EISLER 2, 53,13 PROCESS AND MACHINE FOR VACUUM BOTTLE TUBULAIING AND. PIERCING.

Filed Oct. 7, 1949 5 Sheets-Sheet 3 INVENTOR.

CHARLFJ 5/1115! BY I ATTORNEY v Patented May 1 1951 PROCESS AND MACHINE FOR VACUUM BOTTLE TUBULATING AND PIERGING Charles Eisler, South Orange, N. J.

Application October 7, 1949-, Serial No. 120,105

. The object of the invention is to provide means for practically simultaneously tubulating and piercing the outer blank of a vacuum bottle, the tubulated glass tube serving as a means for subsequently exhausting the vacuum space between inner and outer blanks of the assembled and sealed vacuum bottle.

. A further object of the invention is to provide a machine having novel means for holding the blank and tube in abutment and for serially subjecting the same to operations at stations of the machine to complete the tubulating and piercing operation, as hereinafter more fully set forth.

In the drawings:

Fig. 1 is a top plan view of a machine embodying the invention, showing the sequence of operations, the positions of operation being serially indicated by Roman numerals I--XII, inclusive,

Fig. 2 is a partially sectional, elevational view of a machine embodying the invention, provided with non-rotative heads,

Fig. 3 is an elevational view showing the piercing operation,

. Fig. 4 is a fragmentary, vertical, partly sectional view, showing the exhaust tube positioned in its holder, in working contact with the bottom of the blank, as in the loading position I of Fig. 1,

Fig. 5 is a fragmentary, schematic View, showing the first step in the process of fusing the tube to the blank prior to piercing,

' Fig. 5A is a schematic view of parts shown in Fig. 5, showing their form upon continued 'appli-' cation of heat,

Fig. 6 is a similar view of the parts subjected to the piercing operation,

Fig. 7 is a similar view of the parts in the operation of glazing the pierced aperture, and

Fig. 8 is an elevational view, showing the means employed for tubulating and piercing in a rotating head. a

In Fig. l of the drawings, the machine is shown provided with a plurality of heads, the number and disposition of which may be varied within the spirit and scope of the invention. The sequence of operations, designated by Roman numerals in Fig. 1, is:

I. Loading II. Pre-heating III. Pre-heating IV. Heating V. Heating VI. Tubulating and internal heating of blank VII. Piercing and glazing VIII. Annealing IX. Annealing 4 Claims. (Cl. 49-1) X. Annealing XI. Cooling XII. Unloading.

The machine comprises (see Figs. 1 and 2) the table It having legs H, and a spider l2 secured to the vertical shaft l3, and periodically rotated by an indexing device, such as Geneva wheel I4, driven by pawl l5, mounted on vertical shaft IE to which is keyed the wormwheel ll rotated by wormwheel I 8 on shaft l9. Shaft I 9 is preferably driven through reduction drives 28 and 2| by motor 22. Any other indexing device, such as barrel cam-intermittent gearing or the like, may be employed, if desired.

The tubulating heads may be either of the non-rotatable (Fig. 3) or of the'rotatable (Fig. 8) type, the-choice being governed generally by the size and diameter of the blank and the wall thickness, the rotatable type of head being generally deemed best suited to large blanks of thick glass. If rotatable heads are employed, corresponding additions and modifications may be readily made in the driving mechanism, such as are shown in some of the machines previously patented by me see, for example, Patent 2,413,960 of January 7, 1947.

Fig. 3 shows a machine having a non-rotative head. The exhaust tube 24 which is to be tubulated to the bottom wall of the blank 23 of U-shaped cross-section has (at the loading position I) been inserted into the bore 25 of the tube holder 26 (Fig. 4), the tube holder having the threaded plug 21 having the head 28 for adjusting depth of the insertion. The tube holder 26 is adjustable, as by setscrew 29, on the post 30 mounted in the spider I2. 1 The threaded plug 2'! has the axial airhole 3| terminating in the conical mouth 32 for admission of a blast of compressed air'during the piercing (Fig. 6) operation. When the exhaust tube 24 is in place, the blank 23 is inserted into the open retaining collar 33 of blank retainer bracket 34 which is slidable on the post 30 and provided with setscrew or similar means to engage the post to fix its position thereon. The blank is moved downwardly until it rests atop the exhaust tube, as shown in Fig. 4. After loading, the blank passes serially to positions II, III, IV and V, where it is preheated and heated by burners 35 and 36.

At position VI, inside heating of the bottom of the blank is effected by the vertical burner 31 to which a gas mixture is fed by duct 38 and the flexible tube 39 which is connected to mixer 40 (Fig. 2) of the gas, oxygen and air ducts 4|, 42, 43, supplied from an outside source by pipes 4m,

42a, 43a (Fig. 1). Vertical gas duct 38 is secured by bracket 44 to the vertical shaft 45 slidable in support 46, and is raised and lowered by any desired or convenient means, such as the lever 4? fulcrumed in bracket 48 (Fig. 2), the end 41 of the lever being disposed in following engagement with barrel cam G9 on wormwheel shaft !6. Any other means for actuating shaft 45 may be employed, such as a compressed air device, which would have the advantage of eliminating the barrel cam and lever. On raising shaft 45, the gas duct 38 and the burner 37. may be entirely bottom of said blank internally and for externally heating the same, to fuse the same to the tube and seal the same at the point of abutment therewithdrawn from the blank 23, as indicated in dotted lines in Fig. 3.

At position VI (Fig. 5), the vertical burner 31' is lowered into the blank 23 and the inside bot tom of the blank is heated, the outside thereof being kept hot by burners 50. burner 37 heats the tubulation juncture T and makes a weakened cavity (56, Figba) which may be fractured to define an opening 6% in the bottom of the blank communicating with the tube 24, or punctured as hereinafter set forth, the bottom wall of the blank being weakened (or rendered very plastic at least, at 66). passes to position VII where the flame from the burner 3? is partially turned off and a blast of air is passed through the duct 3! in plug 21 and so through the exhaust tube and the bottom of the glass blank, thus perforating it at 555 as shown in Fig. 6. As soon as the blast of air is shut ofi by means of economizer til-the flame of burner 37 effects the glazing of the perforation 65 and its first annealing. Complete annealing of a large blank would best be effected by a third, similar device, at position VIII, but, with a small blank, this would not be necessary and outside annealing by burners 59 is found to be sufiicient. At positions VIII, IX, X, further annealing is effected by burners 52; the tubulated blank is then allowed to cool at position XI and is unloaded at position XII.

The rotating form of head is shown in Fig. 8 wherein the bracket 54 is shown'provided with posts 53 on which are adjustably mounted the open blank retainer brackets 55 and the tube holder 26. The bracket 54 is keyed to the sleeve shaft 56 which is rotatable on the hollow shaft 51' provided with duct 58 for the passage of compressed air from the supply duct 55. The bracket 54 is rotated by means, such as the cone pulleys 60 and SI, rotation being stopped at the loading and unloading positions by the head stop '62 engaging the stop rail 63; the cone pulley BI is driven by the suitable means, such as the sprocket claim as new and desire to secure by Letters Patent is The flame from 1 The blank then,-

ill

with and to form a cavity in the bottom of said 1 blank depending into said tube, and means for passing a pressure agent through said tube to pierce the said cavity to form an aperture at the tubulating juncture of said tube and blank.

2. The method of tubulating an exhaust tube having open ends to the lower, closed end of a blank U-shaped cross-section, which consists in I vertically disposing the U-shaped blank with its closed end lowermost, positioning the exhaust tube vertically therebelow in abutment with the closed end of the blank, heating the closed end of the tube internally and heating the exhaust tube and said closed end at their abutment areas to fuse the same and to weaken the closed end of the tube in that portion thereof enclosed by of the tube internally and simultaneously passing a blast of air through the tube and against the weakened cavity to perforate the same.

3. In the method of tubulating an exhaust tube having lower ends to a closed end of the blank having a U-shaped cross-section, as set forth in. claim 2, an additional step comprising discontinuing the supply of the blast of air through the exhaust tube and increasing the internal heating of the blank to effect glazing of the perforated area and subsequently annealing the tube and blank at their fused areas.

4. In the method of tubulating an exhaust tube having lower ends secured to a closed end of the blank, having a U-shaped cross-section as: set

forth in claim 2, an additional step comprising discontinuing the supply of the blast of air through the exhaust tube and heating theblank' interiorly at the perforated area to effect glazing thereof.

CHARLES EISLER;

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS