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US3656922A Expired / Lapsed US ⏱️ 0.0 years remaining

Manufacture of glass containers

Assignee: OI Glass Ltd
•
Filing: 1970-03-30
•
Granted: 1972-04-18
•
Expires: 1990-03-30
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Abstract

Abstract A method of manufacturing glass containers, e.g., glass bottles, comprises the steps of: A. FORMING THE CONTAINERS IN A FORMING MACHINE; B. IMMEDIATELY THEREAFTER, AND WHILE THEY ARE STILL HOT FROM THE FORMING, CONTACTING THE CONTAINERS WITH A METAL-ORGANIC COMPOUND IN LIQUID FORM AND OF HIGH THERMAL STABILITY SUCH THAT SUBSTANTIALLY NO DECOMPOSITION OF THE METAL-ORGANIC COMPOUND TAKES PLACE ON CONTACT; C. SUBJECTING THE CONTAINERS TREATED AS IN (B) TO A HEAT TREATMENT TO CAUSE THE METAL-ORGANIC COMPOUND TO REACT WITH THE GLASS AND FORM A DIFFUSE LAYER OF REACTION PRODUCT WITHIN THE GLASS SURFACE; AND D. TREATING THE CONTAINERS WHILE AT A TEMPERATURE OF AT LEAST 450* WITH A METAL COMPOUND IN LIQUID OR VAPOR FORM WHICH DECOMPOSES RAPIDLY ON CONTACT WITH THE CONTAINERS AT THE CONTACTING TEMPERATURE TO PRODUCE A SURFACE FILM OF METAL OXIDE. Tin and titanium compounds are mentioned as suitable reagents, and steps (c) and (d) may take place simultaneously.

Inventors

  • 👤 Sydney Maurice Budd

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 05:04
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/25; C03C17/245; C03C17/34; C03C17/42; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/211; C03C2217/212; C03C2217/229; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/112; C03C2218/15; C03C2218/152; C03C2218/30; C03C2218/32

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 19 words
A method as claimed in claim 1 wherein the heat treatment recited in step (c) is an annealing treatment.
Claim 2
Dependent Claim 15 words
A method as claimed in claim 1 wherein steps (c) and (d) take place simultaneously.
Claim 3
Dependent Claim 21 words
A method as claimed in claim 1 wherein the metal-organic compound is prepared by reacting tin tetrachloride with a lower alcohol.
Claim 4
Dependent Claim 41 words
A method as claimed in claim 4 wherein the metal-organic compound is prepared by reacting tin tetrachloride with isopropanol such that at no time during the reaction is the proportion of tin tetrachloride to isopropanol greater than 33 percent by weight.
Claim 5
Dependent Claim 23 words
A method as claimed in claim 1 wherein the metal-organic compound is prepared by reacting titanium tetrachloride with a lower alkoxide of titanium.
Claim 6
Dependent Claim 35 words
A method as claimed in claim 6 wherein titanium tetrachloride is reacted with titanium tetra-butoxide in alcoholic solution, the solution containing from 1 to 10 percent by weight of the metal-organic compound measured as titanium.
Claim 7
Dependent Claim 21 words
A method as claimed in claim 1 in which the metal compound of step (d) is tin chloride in vapour form.
Claim 8
Dependent Claim 45 words
A method as claimed in claim 1 wherein the containers are cooled to a temperature within the range 80*-180*C after step (d) and then are further treated with polyethylene glycol, a derivative of polyethylene glycol, a polyoxyethylene glycol, a derivative of polyoxyethylene glycol, or polyethylene.
Claim 9
Dependent Claim 25 words
A method as claimed in claim 9 wherein the additional treatment is carried out when the containers are at a temperature between 100* and 150*C.
Claim 10
Dependent Claim 25 words
A method as claimed in claim 9 wherein the additional treatment comprises spraying the containers with a solution or emulsion of a polyethylene glycol mono-stearate.
Claim 11
Independent Claim 113 words
A method of manufacturing glass containers comprising (a) forming thE containers in a forming machine, (b) immediately thereafter, and while the glass containers are still hot from forming, (c) contacting the hot glass containers with a metal-organic compound in liquid form selected from tin and titanium compounds prepared by reacting a tin titrahalide with a lower alcohol or by reacting titanium tetrachloride with a lower alkoxide of titanium, (d) annealing the thus treated containers, and during annealing, and while the containers are at a temperature of at least 450*C, (e) contacting the containers with a metal compound, in liquid or vapor form, selected from the group consisting of tin chloride and titanium tetrachloride.

References Cited (Backward Citations)

US2809124A Cited
US3014815A Cited
US3004863A Cited
US3161537A Cited
US3352707A Cited
US3352708A Cited
US3420693A Cited
US3425859A Cited
US3455722A Cited
US3516811A Cited
US3498819A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-04-18 1975-10-18 1976-04-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-04-18 1979-10-18 1980-04-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-04-18 1983-10-18 1984-04-18 $7700.00 Window Closed / Lapsed

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