| 摘要 |
A mattress covering sewing machine includes a pair of upper and lower support plates for supportingly sandwiching therebetween a cushion wrapped with a pair of box-like outer covers. The support plates have outer peripheral portions extending in a manner to correspond to the shape of the outer peripheral portion of the cushion and coming into contact with the outer peripheral portion of the cushion through the box-like outer cover. The upper plate is mounted to be vertically movable so that the cushion is automatically and uniformly compressed in a direction of thickness of a cushion to permit the outer marginal edge portions of the adjacent box-like covers to be projected outward. The outer marginal edge portions of the adjacent box-like covers are sewn together to provide a mattress. The sewing device can be moved around the entire outer marginal edge portions of the adjacent box-like outer covers.
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