Comber-boards Made of a Solid Piece of Material.
Before ordering a comber-board, it is necessary to know the texture of the fabric in the loom, and also the number or size of the machine to be used; for the number of holes per inch in the comber-board is regulated by this. Afterwards, we may, if we choose, arrange the number of holes in depth of the comber-board, according to the number of griffe-bars in the machine, (guided by the fabric to be made). We may have eight griffe-bars in the machine, and arrange the comber-board 4, 6, 8, 10, 12 rows deep; or we may have 12 griffe-bars in the machine, and arrange the comber-board 12, 10, 8, 6, 4 rows deep.
Rule: The number of holes to one inch in the comber-board must equal the texture of the fabric to one inch in loom.
Example: Suppose a fabric with a texture in the loom of 100 threads, and we are to use a 600 Jacquard machine, with 12 rows. The width of the fabric in the loom is to be 36 inches.
- Required: The number of holes in the width of the comber-board.
- Answer: 100 × 36 = 3600 holes in the comber-board.
- 3600 ÷ 12 = 300, the number of holes in width.
The width and depth of the comber-board are regulated by the width of the cloth required and by the design to be used.
The greater the number of rows in depth the closer they must be; the same is true of the width.
It is necessary to take care not to have the comber-board too deep, as the consequence would be a bad shed; furthermore, we must not have the holes too close together, as in a high texture this would make trouble in the weaving through the catching of the heddles with the warp, and also cause useless chafing of the warp-threads and the heddles.