초록 ▼

A low inertia drive mechanism is disclosed for imparting translational movement to a sewing machine fabric clamp. The drive mechanism comprises a first and second rigid tables mounted on guide rods for independent translational movements in mutually perpendicular straight paths. The second table car

A low inertia drive mechanism is disclosed for imparting translational movement to a sewing machine fabric clamp. The drive mechanism comprises a first and second rigid tables mounted on guide rods for independent translational movements in mutually perpendicular straight paths. The second table carries a pair of transverse rods on which a third rigid table is slidably mounted which may move in any direction in a plane parallel to the planes of said first and second tables. The drive mechanism also comprises stationary motors not carried by any of the tables for imparting reciprocatory motion to the first and second rigid tables. The mechanism further includes means for connecting the fabric clamp to the third rigid table. Also disclosed is a fabric clamp for supporting and guiding fabric for use with a variable translation fabric feeding mechanism. The clamp comprises upper and lower supporting structures, a flat plate extending from the lower supporting structure and having a cutout in its interior portion of a size and shape slightly larger than the pattern to be sewn. The clamp further comprises an upper clamp plate which includes a rigid open frame pivotably mounted at two diagonally opposed corners; the opening in said open frame being about the same size and shape as the cutout in the lower flat plate.

대표청구항 ▼

A low inertia drive mechanism for imparting variable translational movement to a fabric clamp used for supporting and guiding fabric to be sewn in cooperative disposition with respect to the needle of a sewing machine, said mechanism comprising: a first, rigid table mounted for translation in a firs

A low inertia drive mechanism for imparting variable translational movement to a fabric clamp used for supporting and guiding fabric to be sewn in cooperative disposition with respect to the needle of a sewing machine, said mechanism comprising: a first, rigid table mounted for translation in a first straight path on a first pair of fixed rods; a second, rigid table mounted for translation independent of said first table in a second straight path perpendicular to said first straight path on a second pair of fixed rods, said second table having a pair of transverse rods each of which is rigidly mounted on a side of said second table perpendicular to said second pair of fixed rods; a third, rigid table slidably mounted on said transverse rods; means for imparting the translational movement of the first table to the third table whereby said third table may move in any direction in a plane parallel to the planes of said first and second tables; a first stationary servomotor not carried by any of said tables for imparting reciprocatory motion to said first rigid table; a second stationary sermomotor not carried by any of said tables for imparting reciprocatory motion to said second, rigid table; and means for connecting said fabric clamp to said third rigid table.