Patent ID: 11944927
Assignee: PARKER INTANGIBLES LLC
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 12:
13. A method of forming a pleated filter media pack with a filter media sheet, comprising:
pressing embossments into the filter media sheet repeatedly with stamping dies, the stamping dies being in a non-roll form;
creasing the filter media sheet at spaced intervals for forming a plurality of pleat tips, the embossments disposed at least partially between pleat tips;
pleating and gathering the filter media sheet to provide the pleated filter media pack;
advancing the filter media sheet along a travel path, extending the creasing in a direction that is transverse to the travel path and extending the embossments between adjacent creases by pressing a first pattern of embossments into first pleat panels of the filter media sheet and skipping the pressing of the first pattern of embossments on second pleat panels of the filter media sheet, each first pleat panel being connected to the second pleat panel by the creasing, such that the first and second pleat panels mismatch; and
reciprocating the stamping dies into and out of engagement for repeatedly pressing the embossments with a ram.