Methods for making a plurality of filter assemblies

摘要

A method for manufacturing a plurality of filter assemblies is provided that includes providing first and second housing sheets and positioning a filtration medium therebetween. Heat and pressure are applied to form first, second, and peripheral seals of at least two filter assemblies at the same time. Each second seal is positioned outboard of the associated first seal with a non-seal area therebetween, while each peripheral seal is positioned outboard of the associated second seal. The first seal commingles the housing sheets and the filtration medium, while the peripheral seal and the periphery of the second seal commingle only the housing sheets. The peripheral seal may include a tear seal to enable separation of a plurality of adjacent filter assemblies.

主权项

1. A method for manufacturing a plurality of filter assemblies comprising:
providing a first housing sheet and a second housing sheet from housing sheet roll stocks; positioning a filtration medium between said first housing sheet and said second housing sheet; and applying heat and pressure to form a first seal that commingles the first and second housing sheets along with the filtration medium, a second seal, outboard of the first seal, that commingles at least the first and second housing sheets, and a peripheral seal that commingles the first and second housing sheets outboard of the second seal, wherein
a periphery of the second seal commingles only the first and second housing sheets,a non-seal area is defined between the first seal and the second seal,said peripheral seal includes a tear seal enabling separation of a plurality of filter assemblies, andthe first seal, the second seal, and the peripheral seal of one of said filter assemblies are formed at the same time as the first seal, the second seal, and the peripheral seal of another one of said filter assemblies.