| 摘要 |
This method and apparatus contemplate the making of pocketed springs for mattresses and cushions by inserting compressed springs at intervals along and between the plies of a folder two-ply strip of sheeting, maintaining the springs compressed therein while seaming the edges of the plies to form a sleeve about the compressed springs as the strip is drawn lengthwise toward a release point at which each spring is free to expand to spread the plies. This transposes the edge seaming to mid-height of the spring. A previously made cross seam incorporating the transposed edge seaming limits the forward movement of the spring and a further such cross seam made behind the spring encloses the spring within an individual pocket of the sleeve. The repetition of spring release and cross seaming behind each spring released produces a string or chain of pocketed springs with the closing seam of the sleeve at mid-height of the springs. |
