Patent US3763622A successfully refreshed from Google Patents.
US3763622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a pack for absorbing or adding heat
Assignee: Baxter International Inc
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Filing: 1972-09-18
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Granted: 1973-10-09
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Expires: 1992-09-18
Abstract
Abstract A hot or cold pack including a rupturable container having a first chemical therein and a second container having a second chemical therein sealed from the first chemical and reactive therewith to absorb or give off heat. The rupturable container is completely filled with the first chemical to facilitate rupture thereof in response to an impact blow. The rupturable container can be made from heat sealable sheet material in a process which involves heat sealing through a column of the first chemical which extends above the location at which the heat seal is formed to thereby assure complete filling of the container.
Inventors
- 👤 J Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:48
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/32; B65D81/3261; B65D81/3272; B65B; B65B29/00; B65B29/10; F; F24; F24V; F24V30/00; F25; F25D; F25D5/00; F25D5/02; A; A61; A61F; A61F7/00; A61F7/02; A61F2007/0268; A61F2007/0276; A61F7/03; A61F7/10; A61F7/106; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
229 words
A method of making a pack for adding heat to, or removing heat from, an object, including the following steps: providing a rupturable container of sheet material having a bottom and an open upper end with predetermined regions of the container spaced upwardly from the bottom being heat sealable to seal the container; depositing a flowable chemical in the container with the flowable chemical extending at least up to the predetermined regions; heating the flowable chemical to a particular temperature above ambient; heat sealing said predetermined regions of the container to enclose a quantity of the heated flowable chemical in the container whereby complete filling of the sealed container with the flowable chemical is assured and whereby the flowable chemical heated to the particular temperature above ambient prevents the rupturable container from being ruptured during the heat sealing operation; pressurizing the flowable chemical during the sealing of the rupturable container so that the pressure of the enclosed chemical can aid in the rupture of the rupturable container; providing a second container which is capable of being heat sealed; filling the second container with a second chemical and simultaneously inserting the rupturable container into the second container with the flowable and second chemicals being sealed from each other, said chemicals being reactive to absorb or give off heat upon rupTure of the rupturable container; and heat sealing the second container.
Claim 2
Independent Claim
229 words
A method of making a pack for adding heat to, or removing heat from, an object, including the following steps: providing a rupturable container of sheet material having a bottom and an open upper end with predetermined regions of the container spaced upwardly from the bottom being heat sealable to seal the container; depositing a flowable chemical in the container with the flowable chemical extending at least up to the predetermined regions; heating the flowable chemical to a particular temperature above ambient; heat sealing said predetermined regions of the container to enclose a quantity of the heated flowable chemical in the container whereby complete filling of the sealed container with the flowable chemical is assured and whereby the flowable chemical heated to the particular temperature above ambient prevents the rupturable container from being ruptured during the heat sealing operation; pressurizing the flowable chemical during the sealing of the rupturable container so that the pressure of the enclosed chemical can aid in the rupture of the rupturable container; providing a second container which is capable of being heat sealed; filling the second container with a second chemical and simultaneously inserting the rupturable container into the second container with the flowable and second chemicals being sealed from each other, said chemicals being reactive to absorb or give off heat upon rupTure of the rupturable container; and heat sealing the second container.
Claim 3
Dependent Claim
52 words
A method as defined in claim 1 wherein the flowable chemical includes water and calcium chloride and said step of heating includes adding the calcium chloride to the water in sufficient quantities so that the heat of the resulting reaction is sufficient to heat the flowable chemical to a temperature above ambient.
Claim 4
Dependent Claim
68 words
A method as defined in claim 1 wherein the pressurizing step includes confining the flowable chemical to form a column extending through the predetermined regions to the bottom of the container so that the quantity of flowable chemical comprises a portion of the column, whereby the quantity is pressurized by the weight of the column and the pressure is variable in accordance with the height of the column.
Claim 5
Dependent Claim
136 words
A method as defined in claim 1 wherein said step of heat sealing the rupturable container includes providing first and second heat sealing members, heating the heat sealing members to a first temperature in excess of that required for heat sealing said predetermined regions and sufficient to rupture said section of sheet material and relatively advancing said heat sealing members to heat seal said predetermined regions and to squeeze the portion of said flowable chemical from between said predetermined regions, said method including maintaining said flowable chemical at a temperature above ambient but sufficiently below said first temperature to maintain the predetermined regions at a sufficiently low temperature to avoid rupture of the rupturable container whereby if the rupturable container is not filled at least to said predetermined regions said heating members will rupture the container.
Claim 6
Independent Claim
194 words
A method of making a pack for adding heat to, or removing heat from, an object, including the following steps: providing a container of sheet material having a bottom and an open upper end with predetermined regions of the container spaced upwardly from the bottom being heat sealable to seal the container; heating a flowable chemical to a temperature above ambient; depositing the flowable chemical in the container with the heated flowable chemical extending at least partially through the predetermined regions; providing a pair of heat sealing members; heating said heat sealing members to a temperature sufficient to heat seal said predetermined regions; relatively advancing the heat sealing members to heat seal said predetermined regions to thereby seal said container with a quantity of the heated flowable chemical therein and to reduce the temperature of the heat sealing members with such reduction in temperature being lessened by the heating of the flowable chemical; and placing a second container having a second chemical therein adjacent the sealed container with the chemicals being sealed from each other, said chemicals being reactive to absorb or give off heat upon rupture of at least one of said containers.
Claim 7
Independent Claim
194 words
A method of making a pack for adding heat to, or removing heat from, an object, including the following steps: providing a container of sheet material having a bottom and an open upper end with predetermined regions of the container spaced upwardly from the bottom being heat sealable to seal the container; heating a flowable chemical to a temperature above ambient; depositing the flowable chemical in the container with the heated flowable chemical extending at least partially through the predetermined regions; providing a pair of heat sealing members; heating said heat sealing members to a temperature sufficient to heat seal said predetermined regions; relatively advancing the heat sealing members to heat seal said predetermined regions to thereby seal said container with a quantity of the heated flowable chemical therein and to reduce the temperature of the heat sealing members with such reduction in temperature being lessened by the heating of the flowable chemical; and placing a second container having a second chemical therein adjacent the sealed container with the chemicals being sealed from each other, said chemicals being reactive to absorb or give off heat upon rupture of at least one of said containers.
Claim 8
Dependent Claim
29 words
A method as defined in claim 5 wherein said flowable chemical includes water having a salt therein and said step of heating includes adding the salt to the water.
Claim 9
Dependent Claim
67 words
A method as defined in claim 6 wherein said heat sealing members are heated to a first temperature sufficient to rupture the sheet material of said container, said flowable chemical being maintained at a temperature sufficiently below said first temperature to avoid rupture of the container whereby if the container is not filled at least to said predetermined regions said heat sealing members will rupture the container.
Claim 10
Independent Claim
223 words
A method of making a hot or cold pack, including the following steps: providing a first container having rupturable properties and a bottom and side walls defining predetermined heat sealable regions; providing first and second chemicals having characteristics for mixing and reacting to give off heat or cold; depositing the first chemical in the first container; preheating the first chemical to a particular temperature aBove ambient; providing at least a pair of heated jaws; biasing and moving the heated jaws to engage, heat seal and sever the predetermined regions so that the preheated first chemical is enclosed in the first container whereby the preheating of the first chemical to the particular temperature above ambient prior to the engagement of the first container by the heated jaws prevents the first container from being ruptured by the heat from the jaws; providing a controlled delay in the movement of the heated jaws after the severing of the first container to control the movement of the severed container as the jaws disengage and snap into their biased positions; inserting the second chemical and the sealed first container into a second container with the first and second chemicals being sealed from each other, the first and second chemicals being reactive to absorb or give off heat upon rupture of the rupturable container; and sealing the second container.
Claim 11
Independent Claim
223 words
A method of making a hot or cold pack, including the following steps: providing a first container having rupturable properties and a bottom and side walls defining predetermined heat sealable regions; providing first and second chemicals having characteristics for mixing and reacting to give off heat or cold; depositing the first chemical in the first container; preheating the first chemical to a particular temperature aBove ambient; providing at least a pair of heated jaws; biasing and moving the heated jaws to engage, heat seal and sever the predetermined regions so that the preheated first chemical is enclosed in the first container whereby the preheating of the first chemical to the particular temperature above ambient prior to the engagement of the first container by the heated jaws prevents the first container from being ruptured by the heat from the jaws; providing a controlled delay in the movement of the heated jaws after the severing of the first container to control the movement of the severed container as the jaws disengage and snap into their biased positions; inserting the second chemical and the sealed first container into a second container with the first and second chemicals being sealed from each other, the first and second chemicals being reactive to absorb or give off heat upon rupture of the rupturable container; and sealing the second container.
Claim 12
Dependent Claim
71 words
The method as recited in claim 8 further comprising filling the first container from a column of the first chemical which extends from the bottom of the first container to a height above the predetermined region whereby the sealing of the predetermined region encloses a portion of the column which fully occupies the container and the portion is pressurized within the first container in proportion with the height of the column.
Claim 13
Dependent Claim
88 words
The method as recited in claim 9 wherein the first chemical tends to absorb heat from and consequently lower the temperature of the jaws, and the reheating of the jaws causes a delay in the fabrication of the packs and wherein the step of preheating the first chemical is regulated so that the temperature gradient between the first chemical and the jaws is reduced to inhibit heat transfer therebetween, whereby the reheating delay is substantially decreased and the speed with which packs can be fabricated is significantly increased.
Claim 14
Independent Claim
249 words
A method of making hot or cold packs including the steps of: providing first and second chemicals having characteristics for reacting when mixed to give off heat or cold; enclosing the first chemical in a first container having characteristics for being ruptured upon impact to release the first chemical; heating the first chemical to a temperature above ambient temperature; heat sealing the first container at a position below the level of the heated liquid in the container; providing a second container having a bottom and side walls defining heat sealable predetermined regions at the uppermost portions thereof; depositing the second chemical and the rupturable container in the second container so that they occupy less than all of the volume between the predetermined regions and the bottom of the second container and the remaining portion of the volume is occupied by air; expelling at least a portion of the air from the remaining portion of the second container; disposing at least one pair of jaws on the periphery of a pair of rotors to provide a movement of the jaws into relative engagement across the predetermined regions of the second container; heating the jaws to a temperature sufficient to seal the predetermined regions without rupturing the second container during the movement of the jaws across the predetermined regions of the second container; and rotating the rotors to move the heated jaws into relative engagement with the predetermined regions so that the regions are heat sealed to enclose the second container.
Claim 15
Independent Claim
249 words
A method of making hot or cold packs including the steps of: providing first and second chemicals having characteristics for reacting when mixed to give off heat or cold; enclosing the first chemical in a first container having characteristics for being ruptured upon impact to release the first chemical; heating the first chemical to a temperature above ambient temperature; heat sealing the first container at a position below the level of the heated liquid in the container; providing a second container having a bottom and side walls defining heat sealable predetermined regions at the uppermost portions thereof; depositing the second chemical and the rupturable container in the second container so that they occupy less than all of the volume between the predetermined regions and the bottom of the second container and the remaining portion of the volume is occupied by air; expelling at least a portion of the air from the remaining portion of the second container; disposing at least one pair of jaws on the periphery of a pair of rotors to provide a movement of the jaws into relative engagement across the predetermined regions of the second container; heating the jaws to a temperature sufficient to seal the predetermined regions without rupturing the second container during the movement of the jaws across the predetermined regions of the second container; and rotating the rotors to move the heated jaws into relative engagement with the predetermined regions so that the regions are heat sealed to enclose the second container.
Claim 16
Dependent Claim
39 words
A method recited in claim 11 wherein the expulsion of at least a portion of the air from the remaining portion of the second container occurs prior to the heat sealing of the second container by the heated jaws.
Claim 17
Independent Claim
223 words
A method of making a pack for adding heat to, or removing heat from, an object comprising: providing a container of sheet material having a bottom and an open upper end with predetermined regions of the container spaced upwardly from the bottOm being heat sealable to seal the container; depositing a flowable chemical including water and calcium chloride in the container with the flowable chemical extending at least up to the predetermined regions; heating the flowable chemical by adding the calcium chloride to the water in sufficient quantities so that the heat of the resulting reaction is sufficient to heat the flowable chemical to a temperature above ambient; confining some of the flowable chemical to form a column with the column extending from said predetermined regions upwardly; heat sealing said predetermined regions of the container to seal the container while said column extends upwardly from said predetermined regions to thereby seal a quantity of the heated flowable chemical in the container whereby complete filling of the sealed container with the flowable chemical is assured, said sealed container being rupturable; and placing a second container having a second chemical therein adjacent the sealed container with the chemicals being sealed from each other, said chemicals being reactive to absorb or give off heat whereby upon rupture of the sealed container the chemicals are chemically react.
Claim 18
Independent Claim
223 words
A method of making a pack for adding heat to, or removing heat from, an object comprising: providing a container of sheet material having a bottom and an open upper end with predetermined regions of the container spaced upwardly from the bottOm being heat sealable to seal the container; depositing a flowable chemical including water and calcium chloride in the container with the flowable chemical extending at least up to the predetermined regions; heating the flowable chemical by adding the calcium chloride to the water in sufficient quantities so that the heat of the resulting reaction is sufficient to heat the flowable chemical to a temperature above ambient; confining some of the flowable chemical to form a column with the column extending from said predetermined regions upwardly; heat sealing said predetermined regions of the container to seal the container while said column extends upwardly from said predetermined regions to thereby seal a quantity of the heated flowable chemical in the container whereby complete filling of the sealed container with the flowable chemical is assured, said sealed container being rupturable; and placing a second container having a second chemical therein adjacent the sealed container with the chemicals being sealed from each other, said chemicals being reactive to absorb or give off heat whereby upon rupture of the sealed container the chemicals are chemically react.
Claim 19
Dependent Claim
59 words
A method as set forth in claim 6, including the steps of: severing the rupturable container after the heat sealing of the container by the heat sealing member, and providing a controlled delay in the movement of the heat sealing member from the severed container to control the movement of the severed container after the container has been severed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |