Extended release fragrance dispensing cartridge
First Claim
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1. An air freshening cartridge, comprising:
- a housing having means defining an opening;
a pad member mounted in the housing, having an upper surface and having a density of between about 50 and about 150 oz./yd.2 ;
a fragrance agent initially retained substantially within the pad member; and
a permeable membrane having a density of between about 1.5 oz./yd.2 and 9 oz./yd.2 and an air permeability of between about 100 CFM/ft.2 and 400 CFM/ft.2, said membrane covering the housing opening for retaining the pad member within the housing and positioned adjacent the pad member to allow the fragrance agent to be drawn through the pad member to the upper surface thereof to saturate the membrane, thus permitting the fragrance agent to communicate with an environment external to the housing opening through the membrane at a release rate of above about 0.55 to less than about 0.9 grams per day.
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Abstract
A cartridge for an air freshener is disclosed, having a pad sealed within a housing by an air-permeable membrane. The density, permeability, and fiber characteristics of the pad and membrane are selected to achieve extended life while maintaining satisfactory air freshening performance.
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Citations
30 Claims
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1. An air freshening cartridge, comprising:
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a housing having means defining an opening; a pad member mounted in the housing, having an upper surface and having a density of between about 50 and about 150 oz./yd.2 ; a fragrance agent initially retained substantially within the pad member; and a permeable membrane having a density of between about 1.5 oz./yd.2 and 9 oz./yd.2 and an air permeability of between about 100 CFM/ft.2 and 400 CFM/ft.2, said membrane covering the housing opening for retaining the pad member within the housing and positioned adjacent the pad member to allow the fragrance agent to be drawn through the pad member to the upper surface thereof to saturate the membrane, thus permitting the fragrance agent to communicate with an environment external to the housing opening through the membrane at a release rate of above about 0.55 to less than about 0.9 grams per day. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An air freshening cartridge, comprising:
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a housing having means defining an opening; a pad member mounted in the housing, having an upper surface and having a density of between about 120 and about 135 oz./yd.2 ; a fragrance agent initially retained substantially within the pad member; and a permeable membrane having a density of between about 1.5 oz./yd.2 and 9 oz./yd.2 and an air permeability of between about 100 CFM/ft.2 and 400 CFM/ft.2, said membrane covering the housing opening for retaining the pad member within the housing and positioned adjacent the pad member to allow the fragrance agent to be drawn through the pad member to the upper surface thereof to saturate the membrane, thus permitting the fragrance agent to communicate with an environment external to the housing opening through the membrane at a release rate of above about 0.55 to less than about 0.9 grams per day. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. An air freshening cartridge, comprising:
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a housing having means defining an opening; a pad member mounted in the housing, having an upper surface and having a density of between about 65 and about 80 oz/yd.2 ; a fragrance agent initially retained substantially within the pad member; and a permeable membrane having a density of between about 1.5 oz./yd.2 and 9 oz./yd.2 and an air permeability of between about 100 CFM/ft.2 and 400 CFM/ft.2, said membrane covering the housing opening for retaining the pad member within the housing and positioned adjacent the pad member to allow the fragrance agent to be drawn through the pad member to the upper surface thereof to saturate the membrane, thus permitting the fragrance agent to communicate with an environment external to the housing opening through the membrane at a release rate of above about 0.55 to less than about 0.9 grams per day. - View Dependent Claims (24, 25, 26)
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27. An air freshening cartridge, comprising:
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a housing having means defining an opening defined by a lip portion, a shoulder spaced from the lip portion and a recess having a perimeter defined by the shoulder; a pad member mounted in the housing recess, having an upper surface and having a density of between about 65 and about 80 oz./yd.2 ; a fragrance agent initially retained substantially within the pad member; and a permeable membrane having a density of between about 1.5 oz./yd.2 and 9 oz./yd.2 and an air permeability of between about 100 CFM/ft.2 and 400 CFM/ft.2, said membrane covering the housing opening for retaining the pad member within the housing and positioned adjacent the pad member to allow the fragrance agent to be drawn through the pad member to the upper surface thereof to saturate the membrane, thus permitting the fragrance agent to communicate with an environment external to the housing opening through the membrane at a release rate of above about 0.55 to less than about 0.9 grams per day; wherein the shoulder support the membrane and is attached thereto, and the membrane retains the pad member in the recess. - View Dependent Claims (28, 29, 30)
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Specification