CA1047104A - Thermoplastic casings for batteries, with sidewalls having a sinusoidal cross section - Google Patents
Thermoplastic casings for batteries, with sidewalls having a sinusoidal cross sectionInfo
- Publication number
- CA1047104A CA1047104A CA238,052A CA238052A CA1047104A CA 1047104 A CA1047104 A CA 1047104A CA 238052 A CA238052 A CA 238052A CA 1047104 A CA1047104 A CA 1047104A
- Authority
- CA
- Canada
- Prior art keywords
- base
- casing
- side walls
- enclosure
- sinusoidal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920001169 thermoplastic Polymers 0.000 title abstract description 3
- 239000004416 thermosoftening plastic Substances 0.000 title abstract description 3
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000004417 polycarbonate Substances 0.000 claims abstract description 13
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000004033 plastic Substances 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 229920001875 Ebonite Polymers 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 2
- 238000001175 rotational moulding Methods 0.000 description 2
- 229920004142 LEXAN™ Polymers 0.000 description 1
- 239000004418 Lexan Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- -1 polyethylenes Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/145—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against corrosion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S206/00—Special receptacle or package
- Y10S206/819—Material
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
A THERMOPLASTIC CASING AND METHOD OF MANUFACTURING SAME
Abstract of the Disclosure A casing formed by a hollow enclosure molded integral from a polycarbonate material, with at least a portion of the enclosure having a sinusoidal, cross-sectional configuration.
A method of manufacturing a casing of the above type.
Abstract of the Disclosure A casing formed by a hollow enclosure molded integral from a polycarbonate material, with at least a portion of the enclosure having a sinusoidal, cross-sectional configuration.
A method of manufacturing a casing of the above type.
Description
1047~4 Background of the Invention This invention relates to a hollow casing formed of plastic material and a method for manufacturing such a casing.
More particularly, the present invention relates to such a casing and method in which the casing is molded from a poly-carbonate material with its wall having a continuous, sinu-soidal, cross-sectional configuration.
Traditionally, casings manufactured for use in indus-trial applications such as, for example, containers for large storage batteries, have been formed o~ a the~moset or vulcanized material, such as hard rubber. While such composi-tion normally has the desired chemical and load resistant properties required, it is quite heavy, is not flame resis-tant, and has poor impact resistance. Also, the costs of hard rubber have been gradually increasing until the use of plastics has lately become a possible alternativeO
However, the use of plastics in forming casings or other similar structures is not without problems. For example, in the manufacture of relatively large casings, the use of polyethylenes has been proven unsatisfactory since they lack the proper strength properties to accommodate the high mechanical stresses that are often placed on the casing.
Also, thermoplastic polyesters, while having adequate mechan-ical strength, are often susceptible to attack by chemicals and, in addition, are often too costly to be economically feasible.
Of course, it is possible to produce a laminated struc-ture of two plastic materials, one for supplying the re-quired mechanical strength and the other having a proper resistivity to attack by chemicals. However, it can be ~.~
47~
appreciated that the requirement for two plastic materials increases the costs of materials and labor, often to unac-ceptable levels.
Summary of the Invention It is,therefore, an object of the present inven-tion to provide a casing that can be produced from a single thermoplastic material, yet retain the proper strength and chemical resistive characteristics required for industrial use.
It is a further object of the present invention to provide a casing of the above type which is relatively low in cost and relatively easy to manufacture.
It is a further object of -the present invention to provide a method for manufacturing a plastic casing of the above type.
According to the present invention there is pro-vided a battery casing comprising a hollow, acid resistant enclosure molded integral from a polycarbonate material, said enclosure including a base, a plurality of side walls extending from said base and an access opening disposed remotely from said base, said side walls extending substan-tially perpendicular to each other and to said base re-spectively, at least a portion of each of said side walls having a sinusoidal cross-sectional configuration as de-fined by the intersection of said portion with a plane pas-sing through said portion substantially parallel to said base, said sinusoidal cross-sectional configuration forming a plurality of corrugations in said side walls extending between said base and said access opening substantially ~ _3_ ,~
~047~4 perpendicular to said base, the wall thic~ness of said side wall portions being sufficient to prevent lateral flexural displace-ment of said wall portions when said casing is filled with an electrolyte.
Brief Description of the Drawings Fig. 1 is a partial frontelevational, partial sec-tional view of the battery casing of the present invention;
Fig. 2 is a cross-sectional view taken along the line 2-2 of Fig. l;
Fig. 3 is a partial side elevational, partial sec-tional view of the casing of Fig. l; and -3a-,~
47~4 \
Fig. 4 is a cross-sectional view taken along the line 4-4 of Fig. 3.
Description of the Preferred Embodiments The present invention is a result of applicant's dis-covery that a casing produced from a polycarbonate that is rotationally molded into a particular configuration possesses adequate strength characteristics and resistance to attack by chemicals, yet is relatively simple and inexpensive to manufac-ture.
An example of this type casing is shown in Figs. 1-4 in the form of a casing for a relatively large storage battery, and includes an open-ended enclosure, shown in general by the reference numeral 10. The enclosure 10 is formed by front and rear walls 12 and 14, respectively, and side walls 16 and 18 all molded integral with, and extending perpendicular to, a base 20. The base 20 is reinforced with a central circular rib 22 and four diagonal ribs 24 as better shown in Figs. 2 and 4.
Each wall 12, 14, 16 and 18 has a stepped, or shoulder, portion 26 near the open end of the enclosure 10 to form an enlarged mouth portion 28 for the purpose of increasing the volume of the enclosure, and to enable the casing to be suppor-ted or lifted by engaging the shoulder portions. Although not shown in the drawings, it is understood that, in normal use, a cover would be provided over the open end of the enclosure 10 .
According to a feature of the present invention, the cross-section of each of the walls 12, 14, 16 and 18 in a hori-zontal plane as viewed in Figs. 1 and 3, and as shown in Figs.
More particularly, the present invention relates to such a casing and method in which the casing is molded from a poly-carbonate material with its wall having a continuous, sinu-soidal, cross-sectional configuration.
Traditionally, casings manufactured for use in indus-trial applications such as, for example, containers for large storage batteries, have been formed o~ a the~moset or vulcanized material, such as hard rubber. While such composi-tion normally has the desired chemical and load resistant properties required, it is quite heavy, is not flame resis-tant, and has poor impact resistance. Also, the costs of hard rubber have been gradually increasing until the use of plastics has lately become a possible alternativeO
However, the use of plastics in forming casings or other similar structures is not without problems. For example, in the manufacture of relatively large casings, the use of polyethylenes has been proven unsatisfactory since they lack the proper strength properties to accommodate the high mechanical stresses that are often placed on the casing.
Also, thermoplastic polyesters, while having adequate mechan-ical strength, are often susceptible to attack by chemicals and, in addition, are often too costly to be economically feasible.
Of course, it is possible to produce a laminated struc-ture of two plastic materials, one for supplying the re-quired mechanical strength and the other having a proper resistivity to attack by chemicals. However, it can be ~.~
47~
appreciated that the requirement for two plastic materials increases the costs of materials and labor, often to unac-ceptable levels.
Summary of the Invention It is,therefore, an object of the present inven-tion to provide a casing that can be produced from a single thermoplastic material, yet retain the proper strength and chemical resistive characteristics required for industrial use.
It is a further object of the present invention to provide a casing of the above type which is relatively low in cost and relatively easy to manufacture.
It is a further object of -the present invention to provide a method for manufacturing a plastic casing of the above type.
According to the present invention there is pro-vided a battery casing comprising a hollow, acid resistant enclosure molded integral from a polycarbonate material, said enclosure including a base, a plurality of side walls extending from said base and an access opening disposed remotely from said base, said side walls extending substan-tially perpendicular to each other and to said base re-spectively, at least a portion of each of said side walls having a sinusoidal cross-sectional configuration as de-fined by the intersection of said portion with a plane pas-sing through said portion substantially parallel to said base, said sinusoidal cross-sectional configuration forming a plurality of corrugations in said side walls extending between said base and said access opening substantially ~ _3_ ,~
~047~4 perpendicular to said base, the wall thic~ness of said side wall portions being sufficient to prevent lateral flexural displace-ment of said wall portions when said casing is filled with an electrolyte.
Brief Description of the Drawings Fig. 1 is a partial frontelevational, partial sec-tional view of the battery casing of the present invention;
Fig. 2 is a cross-sectional view taken along the line 2-2 of Fig. l;
Fig. 3 is a partial side elevational, partial sec-tional view of the casing of Fig. l; and -3a-,~
47~4 \
Fig. 4 is a cross-sectional view taken along the line 4-4 of Fig. 3.
Description of the Preferred Embodiments The present invention is a result of applicant's dis-covery that a casing produced from a polycarbonate that is rotationally molded into a particular configuration possesses adequate strength characteristics and resistance to attack by chemicals, yet is relatively simple and inexpensive to manufac-ture.
An example of this type casing is shown in Figs. 1-4 in the form of a casing for a relatively large storage battery, and includes an open-ended enclosure, shown in general by the reference numeral 10. The enclosure 10 is formed by front and rear walls 12 and 14, respectively, and side walls 16 and 18 all molded integral with, and extending perpendicular to, a base 20. The base 20 is reinforced with a central circular rib 22 and four diagonal ribs 24 as better shown in Figs. 2 and 4.
Each wall 12, 14, 16 and 18 has a stepped, or shoulder, portion 26 near the open end of the enclosure 10 to form an enlarged mouth portion 28 for the purpose of increasing the volume of the enclosure, and to enable the casing to be suppor-ted or lifted by engaging the shoulder portions. Although not shown in the drawings, it is understood that, in normal use, a cover would be provided over the open end of the enclosure 10 .
According to a feature of the present invention, the cross-section of each of the walls 12, 14, 16 and 18 in a hori-zontal plane as viewed in Figs. 1 and 3, and as shown in Figs.
2 and 4, lS of a sinusoidal shape extending for substantially the entire width of each wall. For the purposes of this appli-47~
cation, it is understood that the term sinusoidal refers to acontinuous curve having equal amplitudes of variation in alternating directions from a center line, thus forming a configuration identical in shape to a sine wave, as is well-known in electronic terminology.
As noted from Figs. 1 and 3, the sinusoidal cross-sectional configuration extends for a substantial por~io`n of the length of each wall 12, 14, 16 a~d 18, from a point adja-cent the base 20 to the enlarged mouth portion 28.
The reference numerals 30 and 32 refer to a pair of reinforcing bands which axe attached to the walls 12 and 14, respectively, and which are shown in dot-dashed lines since they form an optional feature of the present invention. The specific details of the bands 30 and 32 will be described later.
The casing of the present invention is manufactured by rotationally molding a polycarbonate material. According to the method of manufacture, the polycarbonate material, in powder form, is placed in an open mold, the walls of which have a configuration corresponding to the sinusoidal shape discussed above in connection with the walls 12, 14, 16 and 1~ of the casing. The polycarbonate material is heated to a temperature above its melting temperature and the mold is rotated about two axes to deposit a layer of the melted polycarbonate material on the wall surfaces and the bottom of the mold. The mold and material are allowed to cool while rotating, and the material is then stripped from the mold in the basic form of the casing shown in Figs. 1-4. Since the basic rotational molding technique is conventional, it will not be described in any fur$her detail.
9173L~
It has been discovered that, with polycarbonate being used as the material and the walls 12, 14, 16 and 18 configured in the sinusoidal form shown, the resulting casing has strength characteristics and resistance to acidity compatible with use as a relatively large lead-storage battery casing or other similar uses, while eliminating the disadvantages set forth above with respect to the use of hard rubber or other plastic materials.
Example 65 pounds of finely divided LEXAN (Trade Mark) RP-701, a roto-molding grade of polycarbonate marketed by the General Electric Company, is pre-dried in an air circulating oven at 250F. for at least 2 hours in shallow trays not over 2 inches deep. The dried polycarbonate is then molded in the heating oven of a conventional three spindle roto-cast machine (McNeil) at a temperature of 650F. for 28 minutes. Rotation of the spindle of the machine is set at 5 rpm and 6 rpm, respectively, on the major and minor axes to produce a 5:1 ratio of the vertical to horizontal axis rotation. At the end of the oven cycle, the mold is indexed to the cooling chamber of the same machine while rotating on both axes. Cooling is accomplished by a sequence of forced air for 23 minutes, followed by 5 minutes of water fog spray, and again by 1 minute of forced air. After cooling, the mold is indexed to the unload posi-tion of the machine at which time the mold is opened and the molded part removed therefrom.
The resulting casing, with overall dimensions of about 19 3/4" x 17 7/16", x 52 1/8" high, and having an average wall thickness of 3/8" in all respects matches the industry speci-ficationsfor battery casings of this type, while other casings ~47~04 o the same wall thickness and constructed of other plastic materials or having different wall configurations, including those having ribs, or the lïke, projecting from one surface of the walls, lack the structural strength required for these specifications.
As stated above, the bands 30 and 32 may be affixed to the outer surfaces of the walls 12 and 14, respectively, to provide added strength to the casing. The bands 30 and 32 extend for substantially the entire width of their respective walls 12 and 14, and have a tapered, or beveled, cross-section.
A plurality of grooves are formed in the inner surfaces of the bands 30 and 32 to receive the projecting portions of the walls 12 and 14, respectively. The bands 30 and 32 are molded from a iberglass reinforced polyester material with very high flexural modulus p~operties and are affixed to the walls 12 and 14, respectively, by adhesive, or the like.
In addition to increasing the strength characteristics of the casing lO, as discussed above, the use of the bands 30 and 32 makes it possible to decrease the cost of the casing while maintaining its strength characteristics. For example, by including the bands 30 and 32, the casing described in ; connection with the above example can be manufactured with walls having an average thickness of 5/16", yet will match the industry specifications. As a result, the weight of the initial charge of finely divided polycarbonate can be re-duced to 55 pounds thereby reducing the materlal costs con-siderably.
It is understood that several variations may be made in the casing of the present invention without departing from the scope of the invention. For example, the particuiar shape of the casing and the location of the reinforcing bands may be varied. Still other variations of the specific con-L7~
struction and arrangement of the casing and method disclosed - above can be made by those skilled in the art without depart-ing from the invention as defined in the appended claims.
cation, it is understood that the term sinusoidal refers to acontinuous curve having equal amplitudes of variation in alternating directions from a center line, thus forming a configuration identical in shape to a sine wave, as is well-known in electronic terminology.
As noted from Figs. 1 and 3, the sinusoidal cross-sectional configuration extends for a substantial por~io`n of the length of each wall 12, 14, 16 a~d 18, from a point adja-cent the base 20 to the enlarged mouth portion 28.
The reference numerals 30 and 32 refer to a pair of reinforcing bands which axe attached to the walls 12 and 14, respectively, and which are shown in dot-dashed lines since they form an optional feature of the present invention. The specific details of the bands 30 and 32 will be described later.
The casing of the present invention is manufactured by rotationally molding a polycarbonate material. According to the method of manufacture, the polycarbonate material, in powder form, is placed in an open mold, the walls of which have a configuration corresponding to the sinusoidal shape discussed above in connection with the walls 12, 14, 16 and 1~ of the casing. The polycarbonate material is heated to a temperature above its melting temperature and the mold is rotated about two axes to deposit a layer of the melted polycarbonate material on the wall surfaces and the bottom of the mold. The mold and material are allowed to cool while rotating, and the material is then stripped from the mold in the basic form of the casing shown in Figs. 1-4. Since the basic rotational molding technique is conventional, it will not be described in any fur$her detail.
9173L~
It has been discovered that, with polycarbonate being used as the material and the walls 12, 14, 16 and 18 configured in the sinusoidal form shown, the resulting casing has strength characteristics and resistance to acidity compatible with use as a relatively large lead-storage battery casing or other similar uses, while eliminating the disadvantages set forth above with respect to the use of hard rubber or other plastic materials.
Example 65 pounds of finely divided LEXAN (Trade Mark) RP-701, a roto-molding grade of polycarbonate marketed by the General Electric Company, is pre-dried in an air circulating oven at 250F. for at least 2 hours in shallow trays not over 2 inches deep. The dried polycarbonate is then molded in the heating oven of a conventional three spindle roto-cast machine (McNeil) at a temperature of 650F. for 28 minutes. Rotation of the spindle of the machine is set at 5 rpm and 6 rpm, respectively, on the major and minor axes to produce a 5:1 ratio of the vertical to horizontal axis rotation. At the end of the oven cycle, the mold is indexed to the cooling chamber of the same machine while rotating on both axes. Cooling is accomplished by a sequence of forced air for 23 minutes, followed by 5 minutes of water fog spray, and again by 1 minute of forced air. After cooling, the mold is indexed to the unload posi-tion of the machine at which time the mold is opened and the molded part removed therefrom.
The resulting casing, with overall dimensions of about 19 3/4" x 17 7/16", x 52 1/8" high, and having an average wall thickness of 3/8" in all respects matches the industry speci-ficationsfor battery casings of this type, while other casings ~47~04 o the same wall thickness and constructed of other plastic materials or having different wall configurations, including those having ribs, or the lïke, projecting from one surface of the walls, lack the structural strength required for these specifications.
As stated above, the bands 30 and 32 may be affixed to the outer surfaces of the walls 12 and 14, respectively, to provide added strength to the casing. The bands 30 and 32 extend for substantially the entire width of their respective walls 12 and 14, and have a tapered, or beveled, cross-section.
A plurality of grooves are formed in the inner surfaces of the bands 30 and 32 to receive the projecting portions of the walls 12 and 14, respectively. The bands 30 and 32 are molded from a iberglass reinforced polyester material with very high flexural modulus p~operties and are affixed to the walls 12 and 14, respectively, by adhesive, or the like.
In addition to increasing the strength characteristics of the casing lO, as discussed above, the use of the bands 30 and 32 makes it possible to decrease the cost of the casing while maintaining its strength characteristics. For example, by including the bands 30 and 32, the casing described in ; connection with the above example can be manufactured with walls having an average thickness of 5/16", yet will match the industry specifications. As a result, the weight of the initial charge of finely divided polycarbonate can be re-duced to 55 pounds thereby reducing the materlal costs con-siderably.
It is understood that several variations may be made in the casing of the present invention without departing from the scope of the invention. For example, the particuiar shape of the casing and the location of the reinforcing bands may be varied. Still other variations of the specific con-L7~
struction and arrangement of the casing and method disclosed - above can be made by those skilled in the art without depart-ing from the invention as defined in the appended claims.
Claims (5)
1. A battery casing comprising a hollow, acid resistant enclosure molded integral from a polycarbonate material, said enclosure including a base, a plurality of side walls extending from said base and an access opening disposed remotely from said base, said side walls extending substantially perpendicular to each other and to said base respectively, at least a portion of each of said side walls having a sinusoidal cross-sectional configuration as defined by the intersection of said portion with a plane passing through said portion substantially parallel to said base, said sinusoidal cross-sectional configuration forming a plurality of corrugations in said side walls extending between said base and said access opening substantially perpendicular to said base, the wall thickness of said side wall portions being sufficient to prevent lateral flexural displacement of said wall portions when said casing is filled with an electro-lyte .
2. A battery casing as claimed in claim 1, wherein said sinusoidal portion of the side walls is spaced from said base and extends toward said opening, wherein said enclosure further includes a reinforcing strip affixed to a surface of at least one of said side wall portions and including a plurality of grooves on the inner surface of said strip, said grooves being complementary to the sinusoidal configuration of said surface of at least one of said side wall portions whereby said rein-forcing strip enables the wall thickness of said portion to be less than it otherwise would be in order to substantially main-tain said side wall portion in its original configuration.
3. A battery casing as claimed in claim 2, wherein at least a pair of reinforcing strips are affixed to a surface of a pair of opposed side walls of said casing respectively, each of said reinforcing strips including a plurality of grooves in one side thereof, said grooves being complementary to said corrugations.
4. A battery casing as claimed in claim 1, wherin each of said plurality of corrugations in each said portion are of substantially constant size.
5. A battery casing as claimed in claim 1, wherein said side walls form an enlarged mouth portion adjacent the access opening of said enclosure, said enlarged mouth portion forming a shoulder extending outwardly beyond said corrugations in at least one of said side wall portions.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/516,420 US4125187A (en) | 1974-10-21 | 1974-10-21 | Thermoplastic casing and method of manufacturing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1047104A true CA1047104A (en) | 1979-01-23 |
Family
ID=24055504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA238,052A Expired CA1047104A (en) | 1974-10-21 | 1975-10-21 | Thermoplastic casings for batteries, with sidewalls having a sinusoidal cross section |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4125187A (en) |
| CA (1) | CA1047104A (en) |
| IT (1) | IT1048071B (en) |
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| DE3907475A1 (en) * | 1989-03-08 | 1990-09-13 | Schaefer Gmbh Fritz | VENTILATION SYSTEM FOR WASTE CONTAINERS |
| NL9000006A (en) * | 1990-01-03 | 1991-08-01 | Stamicarbon | METHOD FOR MANUFACTURING ARTICLES FROM POLYCARBONATE. |
| US5279442A (en) * | 1991-12-18 | 1994-01-18 | Ball Corporation | Drawn and ironed container and apparatus and method for forming same |
| DE4241115A1 (en) * | 1992-12-07 | 1994-06-09 | Hoechst Ag | End wall made of injection molding material for a wrapping film |
| US6242127B1 (en) | 1999-08-06 | 2001-06-05 | Microporous Products, L.P. | Polyethylene separator for energy storage cell |
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| DE102006014691B3 (en) * | 2006-03-28 | 2007-08-16 | Vb Autobatterie Gmbh & Co. Kgaa | Opposite polarity electrode plates separator for lead-acid storage battery, has base material thickness of separator sheets at exterior edge of border area, where thickness of electrode plate increases in contact area of separator |
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| US11591153B1 (en) * | 2017-02-06 | 2023-02-28 | Rational Packaging Llc | Bifurcated trilobular packaging element |
| US11603248B1 (en) * | 2017-02-06 | 2023-03-14 | Rational Packaging Llc | Foldable corrugated corner elements |
| US11613418B1 (en) * | 2017-02-06 | 2023-03-28 | Rational Packaging Llc | Trilobular packaging element |
| US11104501B1 (en) * | 2018-04-27 | 2021-08-31 | Rational Packaging Llc | Void filling structural packaging element |
| US11492171B1 (en) * | 2017-02-06 | 2022-11-08 | Rational Packaging Llc | Scored corrugated corner elements |
| US10822138B1 (en) * | 2018-04-27 | 2020-11-03 | Rational Packaging Llc | Packaging assembly with corrugated corner elements |
| US11597578B1 (en) * | 2017-02-06 | 2023-03-07 | Rational Packaging Llc | Hourglass shaped packaging element |
| USD887769S1 (en) | 2018-01-05 | 2020-06-23 | LifeFuels, Inc. | Additive vessel |
| USD856083S1 (en) | 2018-01-05 | 2019-08-13 | LifeFuels, Inc. | Bottle including additive vessels |
| US11337533B1 (en) | 2018-06-08 | 2022-05-24 | Infuze, L.L.C. | Portable system for dispensing controlled quantities of additives into a beverage |
| US10512358B1 (en) | 2018-10-10 | 2019-12-24 | LifeFuels, Inc. | Portable systems and methods for adjusting the composition of a beverage |
| US10889482B1 (en) | 2019-09-14 | 2021-01-12 | LifeFuels, Inc. | Portable beverage container systems and methods for adjusting the composition of a beverage |
| US12128009B1 (en) | 2020-04-25 | 2024-10-29 | Cirkul, Inc. | Systems and methods for bottle apparatuses, container assemblies, and dispensing apparatuses |
| US11903516B1 (en) | 2020-04-25 | 2024-02-20 | Cirkul, Inc. | Systems and methods for bottle apparatuses, container assemblies, and dispensing apparatuses |
| US11208253B1 (en) | 2020-07-07 | 2021-12-28 | Rational Packaging Llc | Packaging assembly with support insert |
| US11505393B1 (en) * | 2020-07-07 | 2022-11-22 | Rational Packaging Llc | Packaging assembly with multi-slit support insert |
| US12076697B2 (en) | 2020-07-15 | 2024-09-03 | Cirkul, Inc. | Portable carbonating dispensers |
| US12458165B1 (en) | 2020-10-16 | 2025-11-04 | Cirkul, Inc. | Systems and methods for adjusting content of a beverage |
| USD1111194S1 (en) | 2024-01-02 | 2026-02-03 | Rational Packaging Llc | Foldable corner post |
| USD1106078S1 (en) | 2024-07-10 | 2025-12-16 | Steven L. Morey | Foldable wave fold back corner |
| USD1106819S1 (en) | 2024-07-10 | 2025-12-23 | Steven L. Morey | Foldable corrugated corner element |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1014524A (en) * | 1910-12-07 | 1912-01-09 | Frank H Sabourin | Barrel. |
| US3147151A (en) * | 1958-10-03 | 1964-09-01 | Electro Acid Corp | Electric storage battery and casing |
| US3167458A (en) * | 1961-10-20 | 1965-01-26 | Brazell William Allen | Storage battery case |
| US3215307A (en) * | 1963-04-05 | 1965-11-02 | Greif Bros | Expansible drum liner |
| US3264396A (en) * | 1964-01-06 | 1966-08-02 | Dow Chemical Co | Method of injection molding a tote case |
| US3558001A (en) * | 1969-08-07 | 1971-01-26 | Exxon Research Engineering Co | Thermoplastic container |
| BE792536A (en) * | 1971-12-09 | 1973-06-08 | Globe Union Inc | ACCUMULATOR BATTERIES AND BINS FOR THESE |
| US3901406A (en) * | 1972-09-18 | 1975-08-26 | Jerome S Kivett | Container |
-
1974
- 1974-10-21 US US05/516,420 patent/US4125187A/en not_active Expired - Lifetime
-
1975
- 1975-10-21 IT IT51863/75A patent/IT1048071B/en active
- 1975-10-21 CA CA238,052A patent/CA1047104A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US4125187A (en) | 1978-11-14 |
| IT1048071B (en) | 1980-11-20 |
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