Odor absorbent evaporative pad
An evaporative pad comprising a plurality of layers of highly absorbent slit and expanded wicking papers and at least one layer of slit and expanded non-absorbent material carrying a coating of adsorbent particles bonded to exposed surfaces of the layer of non-absorbent material disposed between a pair of adjacent wicking layers in the pad. The wicking layers and non-absorbent layer coated with adsorbent particles are disposed in parallel overlying relationship to one another and bonded together to form the evaporative pad.
1. An evaporative pad comprising, in combination,
a) a plurality of slit and expanded layers of wicking paper having opposing major surfaces disposed in parallel overlying relationship to one another to form a stack; and
b) at least one slit and expanded layer of a non-absorbent material, which is not readily wetted, disposed in parallel overlying relationship to a major surface of at least one of said layers of wicking paper and including a coating of adsorbent particles bonded to exposed outer surfaces of said layer of non-absorbent material; and
c) means to secure said layers together to form the evaporative pad.
2. The evaporative pad in accordance with claim 1 wherein said layers of wicking paper and said layer of non-absorbent material are adhesively bonded to the adjoining layers.
3. The evaporative pad in accordance with claim 1 wherein said layer of non-absorbent material is a sheet of non-wicking paper having opposing major faces coated with a film of non-absorbent material underlying said coating of adsorbent particles.
4. In combination with an improved evaporative filter pad comprising a plurality of layers of slit and expanded wicking paper disposed in parallel adjoining relationship and bonded to one another to form a stack, the improvement comprising at least one layer of slit and expanded non-absorbent material disposed in bonded relationship between two of said layers of wicking paper, said layer of non-absorbent material being not readily wetted and having a coating of adsorbent particles bonded in overlying relationship to opposing major surfaces of said layer of non-absorbent material.
5. The evaporative pad in accordance with claim 1 wherein said adsorbent particles are activated carbon.
6. The evaporative pad in accordance with claim 1 wherein said adsorbent particles are taken from a group consisting of activated carbon, zeolite, and molecular sieves or a combination thereof.