| 摘要 |
A device for positioning and joining at an angle, by a sewing machine, the edges of two flaps of fabric, particularly of a horizontal sheet and of a vertical band for forming a mattress case, said device comprising a first guiding wall for the edge of the sheet and a second guiding wall for the edge of the band, said walls forming mutually adjacent cylindrical sectors, two advancement elements being further provided which comprise rotating heads accommodated within cavities formed by said walls, said walls being movable between a position in which said rotating heads tangentially engage the edges of said sheet and said band on said walls in order to advance said edges toward a sewing region and a position in which said walls allow said heads to disengage from said walls.
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