Presser devices for sewing buttonholes

Claim 2

A sewing machine having a slotted work supporting throat plate, a feed dog including a work engaging bar surmounted with resilient material shiftable through said throat plate slot, and a presser foot arranged in opposition to said throat plate, in combination with a shoe member slidably supported relatively to said presser foot for translatory movement in the direction of said throat plate slot and including a bottom web portion arranged in opposition to the work engaging bar of said feed dog, a work engaging plate member having a thin substantially planar metallic portion arranged in operative position transposed between the web portion of said shoe member and the resilient work engaging bar of said feed dog, means for sustaining said work engaging plate member for translatory movement with said shoe member and in substantial congruity therebeneath, and means for interconnecting said shoe member with said work engaging plate member with capacity for movement of said work engaging plate member relatively toward and away from said shoe member.

Claim 3

The combination as set forth in claim 1 in which said work engaging plate member projects laterally beyond said shoe member, an in which said work engaging plate member laterally beyond said shoe member is formed with a reinforcing rib struck out of the plane of said substantially planar portion and in a direction toward said shoe member.

Claim 4

A presser device for use with a sewing machine having a buttonhole producing mechanism therein comprising a presser foot formed with a shank adapted to be secured to said sewing machine, and a sole plate formed with a laterally elongated needle aperture, a shoe member slidably supported relatively to said presser foot sole plate for movement in a direction transversely of said elongated needle aperture, a work engaging plate member having an operative position beneath said shoe member, and means for interconnecting said members in a position of substantial congruity so as to partake of said sliding movement together relatively to the presser foot but with capacity for universal tipping of said work engaging plate member relatively to said shoe member, said interconnecting means comprising a laterally extending bracket carried by one of said members, said bracket including a thin substantially planar portion arranged substantially parallel to the presser foot sole plate in the assembled position of said parts, a single non-circular aperture formed in said planar bracket portion, a projection carried by the other of said members, said projection having a crosssectional configuration corresponding closely to that of said single non-circular aperture in said bracket, and said projection extending substantially perpendicularly through said bracket aperture when said work engaging plate occupies an operative position beneath said presser foot sole plate.

Claim 5

A presser device for use with a sewing machine having a buttonhole producing mechanism therein comprising a presser foot formed with a shank adapted to be secured to said sewing machine, and a sole plate formed with a laterally elongated needle aperture, a shoe member slidably supported relatively to said presser foot sole plate for movement in a direction transversely of said elongated needle aperture, a work engaging plate member having an operative position beneath said shoe member, and means for interconnecting said members in a position of substantial congruity so as to partake of said sliding movement together relatively to the presser foot but with capacity for universal tipping of said work engaging plate member relatively to said shoe member, said interconnecting means comprising a laterally extending bracket carried by one of said members, said bracket including a thin substantially planar portion arranged substantially parallel to the presser foot sole plate in the assembled position of said parts, a single non-circular aperture formed in said planar bracket portion, a projection carried by the other of said members, said projection having a crosssectional configuration corresponding closely to that of said single non-circular aperture in said bracket, and said projection extending substantially perpendicularly through said bracket aperture when said work engaging plate occupies an operative position beneath said presser foot sole plate.

Claim 6

A presser device as set forth in claim 2 in which said bracket comprises a detachable element formed with surfaces complimental to said shoe member for exchangeable attachment to said shoe member.

Claim 7

A presser device as set forth in claim 2 in which said bracket is carried by said shoe member and in which said non-circular aperture is a substantially straight slot elongate in a direction perpendicular to the needle aperture in Said presser foot sole plate, and in which said projection is carried by said work engaging plate and comprises an upstanding blade laterally offset therefrom.