Michael G Demura

US Patent:

51472783, Sep 15, 1992

Filed:

Sep 29, 1989

Appl. No.:

7/414844

Inventors:

Michael Demura - Sterling MI
James LaCombe - Bay City MI
Roger A. Novak - Bay City MI
Raymond D. Barta - Midland MI

Assignee:

DowBrands L.P. - Indianapolis IN

International Classification:

B65H 4508

US Classification:

493439

Abstract:

An apparatus and method for introducing a pleat into an advancing folded-over film web is provided which utilizes air under low pressure to separate the opposing faces of the web prior to the pleat being made. By unblocking the faces of the folded-over web, the web may be readily advanced and pleated without hang ups, misalignment, or tearing of the web. The apparatus includes a pair of substantially aligned and spaced-apart receiving plates over which opposing faces of the film web pass, a generally circular wheel positioned between the receiving plates and extending into the space therebetween for forming a pleat in the folded-over film, and an air passage positioned between the receiving plates for directing a flow of air between the opposing faces of the film web to separate the opposing faces of the web prior to passing over the receiving plates.

US Patent:

52464164, Sep 21, 1993

Filed:

Aug 10, 1992

Appl. No.:

7/926320

Inventors:

Michael Demura - Sterling MI
James LaCombe - Bay City MI
Roger A. Novak - Bay City MI
Raymond D. Barta - Midland MI

Assignee:

Dowbrands L.P. - Indianapolis IN

International Classification:

B65H 4508

US Classification:

493439

Abstract:

An apparatus and method for introducing a pleat into an advancing folded-over film web is provided which utilizes air under low pressure to separate the opposing faces of the web prior to the pleat being made. By unblocking the faces of the folded-over web, the web may be readily advanced and pleated without hang ups, misalignment, or tearing of the web. The apparatus includes a pair of substantially aligned and spaced-apart receiving plates over which opposing faces of the film web pass, a generally circular wheel positioned between the receiving plates and extending into the space therebetween for forming a pleat in the folded-over film, and an air passage positioned between the receiving plates for directing a flow of air between the opposing faces of the film web to separate the opposing faces of the web prior to passing over the receiving plates.