IPC分类号：
A47L7/04 | A47L7/00 | B01D46/42
当前申请(专利权)人：
RILEY, MICHAEL D. | INMAN, VICTOR L. | ATHEY, JR., ROBERT D.
原始申请(专利权)人：
RILEY, MICHAEL D. | INMAN, VICTOR L. | ATHEY, JR., ROBERT D.
当前申请(专利权)人地址：
Santa Monica, CA | Orangevale, CT | El Cerrito, CA
发明人：
RILEY, MICHAEL D. | INMAN, VICTOR L. | ATHEY, JR., ROBERT D.
代理机构：
FLEHR,HOHBACH,TEST,ALBRITTON & HERBERT
摘要：
A filter and method for applying differential levels of active ingredient materials to specific areas of filters, such as the filter paper used to make disposable vacuum cleaner bags, so as to cause the effluent such as air which has passed through such filters to sustainably act as a dispersing agent for such filter-impregnated active ingredients as may condition the effluent which has passed through the filter in ways that are desirable to the user of the filter. The active ingredients are unevenly distributed on the filter substrate in a pattern determined by predicted changing flow rate patterns through the area of the substrate during intervals of increasing accumulation of particulate matter against the filter and effective to maximally sustain dispersion of active ingredient during such intervals.
技术问题语段：
Previous efforts to develop disposable vacuum cleaner bags which would dispense such active ingredients as perfumes or reodorants into filtered effluents such as air have apparently encountered at least two difficulties: the requirement that the effective action of the active ingredients must be sustained over extended periods of time, and the unacceptably high expenses involved in uniformly applying the requisite high saturation levels of expensive active ingredients throughout the filter, or the expense of treating these ingredients in a manner that would acceptably prolong their effectiveness.|None of these devices or teachings of prior art overcome the problems of extended filter ingredient durability and excessive expense discussed above, nor do they deal with economical methods of application or ingredient formulation|Or (3) the powder could prevent the sticky surfaces of the paper from adhering one to the other in a manner that would decrease or eliminate the usefulness of the bag, by making it difficult to fold, package, or otherwise fabricate, without inducing undesired self-adherence
权利要求：
What is claimed is:
1. A process for maximizing effectiveness of active ingredient on a filter substrate, which comprises providing a filter having a filter substrate defining an area and being porous to a fluid which passes through the filter in use of the filter, measuring filtration rate distribution through the filter substrate by introducing a finely divided material into the fluid effluent, observing resultant patterns of placement of the finely divided material on the filter substrate, and using the resultant patterns to establish a varying density of at least one active ingredient capable of dispersion into the filter and discharge with the fluid, that can be deposited on said substrate to sustain the effectiveness of the at least one active ingredient in use of the filter, the varying density being in a pattern determined by predicted changing flow rate patterns from the resultant patterns through the area of the substrate during intervals of increasing accumulation of particulate matter against the filter and effective to maximally sustain dispersion of active ingredient during the intervals.
2. The process of claim 1 additionally comprising the step of depositing the at least one active ingredient on the substrate in the varying density.
3. The process of claim 2 in which the at least one active ingredient is deposited on the filter substrate by printing.
4. The process of claim 1 in which said at least one active ingredient comprises a plurality of active ingredients and said active are deposited on the filter substrate in a plurality of layers of varying density.
5. The process of claim 4 in which the plurality of layers are deposited with a multi-layer printing press in a single pass.
6. The process of claim 4 in which the plurality of layers are deposited by the successive application of a first active ingredient in fluid form which will dry to a sticky or tacky finish, followed by the application of a second active ingredient or an insert ingredient in solid, dry powdered form to the filter substrate, and mechanical removal of the second active ingredient or inert ingredient which has not adhered to the first active ingredient.
7. The process of claim 6 in which the first active ingredient comprises a rubber, a polar solvent and a cationic surfactant.
8. The process of claim 7 in which the first active ingredient additionally comprises a perfume, deodorant or reodorant.
9. The process of claim 8 in which the perfume, deodorant or reodorant is in a time released vehicle wherein the dispensation rate of the perfume, deodorant or reodorant can be selectively enhanced or retarded.
10. The process of claim 1 in which the at least one active ingredient includes a stabilizer.
11. The process of claim 10 in which the stabilizer is a dye.
12. The process of claim 11 in which the at least one active ingredient is a perfume, deodorant or reodorant and the stabilizer is a polymer with a solubility parameter and chemical structure which closely match a solubility parameter and chemical structure of the perfume, deodorant or reodorant.
13. The process of claim 12 in which the stabilizer is a bacteriostat or bactericide.
14. The process of claim 12 in which the at least one active ingredient is an essential oil and the stabilizer is an oxidant.
15. The process of claim 1 in which the at least one active ingredient is deposited by mixing charged particles and a friable polymer with active ingredients to form a powder mixture, and then using charging conditions to deposit the powder mixture on the filter substrate, and then heat setting the powder mixture in place.
16. The process of claim 1 in which the varying density is established in a pattern effective for allowing dispersion through less than all of the filter.