Sewing machine accessory

Claim 2

A sewing machine assessory for use in sewing two or more panels of material together comprising a jig having a base plate and cover plate, said plates being adapted to clamp said panels of material therebetween so as to allow the sewing machine to sew said panels together along a required sewing line; and upstanding rib mounted directly on one of said plates parallel with and adjacent said sewing line; a drive track comprising a toothed rack on said rib; and drive means adapted to be mounted on said sewing machine so that a drive member thereon comprising a pinion co-operates with said drive track on the jig at a place adjacent to the position of the sewing machine needle on said sewing line, said drive means being actuable to drive the jig so that said sewing machine needle sews along said sewing line, the jig being shaped to define said sewing line along three sides of a flap and said rack being situated on the outside of said sewing line and facing away therefrom.

Claim 3

A sewing machine accessory as claimed in claim 1 wherein said rack is a length of molded material bonded directly to one of said plates.

Claim 4

A sewing machine accessory for use in sewing two or more panels of material together comprising a jig having a base plate and cover plate, said plates being adapted to clamp said panels of material therebetween so as to allow the sewing machine to sew said panels together along a required sewing line; an upstanding rib mounted directly on one of said plates parallel with and adjacent said sewing line; a drive track on said rib; drive means adapted to be mounted on said sewing machine so that a drive member thereon co-operates with said drive track on the jig at a place adjacent to the position of the sewing machine needle on said sewing line, said drive means being actuable to drive the jig so that said sewing machine needle sews along said sewing line; a cam profile on said drive track; microswitch means positioned to co-operate with said cam profile to be operated in dependence on the position of the jig; an electric motor coupled to drive said drive member and a control circuit for controlling the speed of said electric motor, said control circuit including and being controlled by said microswitch means, said cam profile and control circuit being operable to feed said jig slowly at the beginning and end of said sewing line and quickly therebetween.

Claim 5

A sewing machine accessory for use in sewing two or more panels of material together comprising a jig having a base plate and cover plate, said plates being adapted to clamp said panels of material therebetween so as to allow the sewing machine to sew said panels together along a required sewing line; an upstanding rib mounted directly on one of said plates parallel with and adjacent said sewing line; a drive track on said rib; drive means adapted to be mounted on said sewing machine so that a drive member thereon co-operates with said drive track on the jig at a place adjacent to the position of the sewing machine needle on said sewing line, said drive means being actuable to drive the jig so that said sewing machine needle sews along said sewing line; a cam profile on said drive track; microswitch means positioned to co-operate with said cam profile to be operated in dependence on the position of the jig; an electric motor coupled to drive said drive member and a control circuit for controlling the speed of said electric motor, said control circuit including and being controlled by said microswitch means, said cam profile and control circuit being operable to feed said jig slowly at the beginning and end of said sewing line and quickly therebetween.