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Philip Yaghmai - Project Engineer

Excessive air pockets in signatures as the signatures are folded often result in unwanted wrinkles creating waste. Perforation blades are used to reduce this effect. However the existing designs were inadequate.

The design shown below created larger cuts in the signature spine allowing more air to escape and therefore minimized waste related to wrinkles.


Perforating Blade


Perforating Blade

BEY International LLC

Philip Yaghmai

1725 Loma Ave. #15

Long Beach,



Phone: 562-544-3923

Fax: 562-719-2692

E-mail: pyag@msn.com

E-mail: philip@projectengineer.com