Patent ID: 6018936
Filing Date: 2000-02-01
Classification: B65B

Abstract:
A tape tightening mechanism for an automatic packer, comprising a conventionally structured tension arm, a rail having an upper end pivotally connected to a top rear end of said tension arm and a lower end leading to a tape-feeding channel which has an upper end opening facing and aligning with a bottom opening of said rail, a vertical section downwardly extended from said lower end of said rail to normally locate and form a stop wall to a top rear side of said tape-feeding channel, a first roller provided to one outer side of an upper end of said vertical section, an inclination-adjustable planar surface on and along which said first roller rotates to decide an inclination for said rail when said rail is moved, and a spring mounted in said tape tightening mechanism with an upper end connected to said rail and thereby pulling said rail downward to keep said first roller always fitly contacting with said planar surface; whereby when said tension arm is caused to swing backward and thereby tightens a tape for packing, said rail is pushed by said backward swung tension arm to move backward while said first roller rotates along said inclined planar surface to limit height changes of said lower end of said rail during its backward movement, and said vertical section extended from the lower end of said rail separates from said tape-feeding channel to form a widened path for the tape to pass therethrough and enter said rail via said bottom opening of said rail without becoming bent.