Air treatment dispensers delivering multiple chemicals
First Claim
1. An air treatment chemical dispensing system, comprising:
- a first substrate bearing a first volatile air treatment chemical capable of being dispensed from the first substrate when the first substrate is heated;
a second substrate bearing a second volatile air treatment chemical capable of being dispensed from the second substrate when the second substrate is heated;
an indicator unit holding a volatile indicator chemical separate from both the first volatile air treatment chemical and the second volatile air treatment chemical;
wherein the second substrate is in a form of a porous structure stacked over the first substrate and has an opening in the form of an axial pathway;
wherein the indicator unit is stacked over the second substrate; and
wherein the dispensing system is configured such that heat from the first substrate is able to pass through the axial pathway of the second substrate to the indicator unit.
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Accused Products
Abstract
Devices for dispensing air treatment chemicals are described. They have a first substrate bearing a first volatile air treatment chemical that is dispensed when the first substrate is heated, and a second substrate bearing a second volatile air treatment chemical that is dispensed from the second substrate when the second substrate is heated. The substrates are positioned in stacked fashion relative to each other, optionally with a permeable membrane there between. There may also be a use-up cue indicator unit coordinated with use of the chemicals. The first and second substrates and indicator unit can be in a single replaceable cartridge unit, preferably with the second substrate in the form of a porous ring that houses the indicator unit.
62 Citations
13 Claims
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1. An air treatment chemical dispensing system, comprising:
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a first substrate bearing a first volatile air treatment chemical capable of being dispensed from the first substrate when the first substrate is heated; a second substrate bearing a second volatile air treatment chemical capable of being dispensed from the second substrate when the second substrate is heated; an indicator unit holding a volatile indicator chemical separate from both the first volatile air treatment chemical and the second volatile air treatment chemical; wherein the second substrate is in a form of a porous structure stacked over the first substrate and has an opening in the form of an axial pathway; wherein the indicator unit is stacked over the second substrate; and wherein the dispensing system is configured such that heat from the first substrate is able to pass through the axial pathway of the second substrate to the indicator unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An air treatment chemical dispensing system, comprising:
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a first substrate bearing a first volatile air treatment chemical capable of being dispensed from the first substrate when the first substrate is heated; a second substrate bearing a second volatile air treatment chemical capable of being dispensed from the second substrate when the second substrate is heated; an indicator unit holding a volatile indicator chemical separate from both the first volatile air treatment chemical and the second volatile air treatment chemical; wherein the second substrate is in a form of a porous structure stacked over the first substrate; wherein the indicator unit is stacked over the second substrate; and wherein the dispensing system is configured such that heat from the first substrate is able to pass through the second substrate to the indicator unit; wherein the porous structure is a porous ring; and wherein the first and second substrates are separated by a sealing layer sufficient to resist transfer of the volatile of either of the substrates to the other substrate.
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12. An air treatment chemical dispensing system, comprising:
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a first substrate bearing a first volatile air treatment chemical capable of being dispensed from the first substrate when the first substrate is heated; and a second substrate bearing a second volatile air treatment chemical capable of being dispensed from the second substrate when the second substrate is heated; wherein the second substrate is in a form of a porous structure stacked adjacent to the first substrate; wherein the porous structure is a porous ring; and wherein the porous structure comprises a ring shaped body having an annular channel and a frustum shaped cavity radially inward of the annular channel. - View Dependent Claims (13)
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Specification