APPAREIL A PIED PRESSEUR REGLABLE POUR MACHINES A COUDRE DESTINEES A LA FABRICATION DE MATELAS- Brevets WO9735058 (A1)

APPAREIL A PIED PRESSEUR REGLABLE POUR MACHINES A COUDRE DESTINEES A LA FABRICATION DE MATELAS

N° de brevet:	WO9735058 (A1)
Date de publication:	1997-09-25
Inventeur(s):	MULCAHEY CHARLES E;PORTER MICHAEL R;KIRBY JOHN J;
Demandeur(s):	PORTER SEWING MACHINES INC [US];
Classification:	D05B11/00;D05B27/06;D05B35/08;
N° de demande:	WO1997US04424 19970320
Numéro(s) de priorité:	US19960618898 19960320

A method and apparatus for forming a partial mattress sack which prevents radial bunching of the mattress. The method includes the steps of feeding first (206) and second (205) panels having different edge lengths at different rates through a sewing machine to form the partial mattress sack. The apparatus includes a variable speed upper walking foot (320) having an automatic speed adjustment (352).