초록 ▼

A dual suction unit and method of operation uses a main tube with a Venturi assembly having a primary suction inlet positioned in the inlet of the main tube and a branch tube joined at its outlet to the mid-portion of the main tube and having a secondary suction inlet at its opposite end. Compressed

A dual suction unit and method of operation uses a main tube with a Venturi assembly having a primary suction inlet positioned in the inlet of the main tube and a branch tube joined at its outlet to the mid-portion of the main tube and having a secondary suction inlet at its opposite end. Compressed air flowing through the Venturi assembly induces a primary suction at its suction inlet and a significantly stronger secondary suction at the inlet of the branch tube than known in the prior art. Waste or other matter may be conveyed from separate sources to the respective primary and secondary suction inlets.

대표청구항 ▼

A method of removing waste from two sources of waste on a sewing machine, said method comprising the steps of: (a) providing a dual suction unit having (1) a main tube with an inlet at one end and an outlet at its opposite end and (2) a branch tube with an inlet at one end and and outlet juncture at

A method of removing waste from two sources of waste on a sewing machine, said method comprising the steps of: (a) providing a dual suction unit having (1) a main tube with an inlet at one end and an outlet at its opposite end and (2) a branch tube with an inlet at one end and and outlet juncture at its other end communicating with the main tube at a point between the inlet and outlet ends of the main tube; (b) providing a Venturi assembly in the inlet of the main tube; (c) providing a straight length of the main tube extending form the venturi assembly through the outlet juncture of the branch tube, (d) providing first and second delivery tubes; (e) connecting the first delivery tube to one source of waste on the sewing machine and to the Venturi assembly in the main tube of the dual suction unit and connecting the second delivery tube to the second source of waste on the sweing machine and the the inlet of the branch tube of the dual suction unit; (f) providing a source of compressed air; and (g) connecting the Venturi assembly to said source of compressed air, whereby suction is induced through the inlet of the main tube and through the inlet of the branch tube to deliver waste from the two sources of waste on the sewing machine to the outlet of the main tube.