The three-eye set, also known as knock-on-eye wear, is the earliest method of setting the flat line. It is near the booklet's mouth of about 6mm, first three eyelets, and then manually thread the cotton thread or thread into the eye to put the book block. It is relatively simple to set the prison and the method of bookbinding. Three eyes set more manual operation, the efficiency is very low. Books that were booked in this way were difficult to read, and the ordering lines were easy to relax when they were flipped. Therefore, they were quickly replaced by wire binding and perfect binding. At present, this method is only used to set thicker book blocks and processed bound books.
Sewing is a method of securing the book block by sewing it with a sewing machine along the opening of the book block. This kind of bookbinding method is suitable for sewing thin books of about 200 pages. It is a kind of bookbinding method that is often used in paperback books with a small number of pages. It is firmly connected and is not afraid of moisture.
More used in wet areas in southern China. The disadvantage of this method of bookbinding is that the speed of bookbinding is slow, and only stand-alone production is not easy to achieve linkage.
According to the provisions of the national industry standard CY/T28-99, the quality requirements for sewing book blocks are as follows:
The distance between the order line and the back of the book block is: 4 to 6 mm below 100 pages; 100 to 5 mm above 100 pages.
Number of needles: 16 open book cores, 17±2 needles; 32 open book cores, 12±2 needles, 64 open book cores, 7±2 needles; 16
The following needle spacing is 3~4mm.
The ordering line should be straight, without missing needles, out of sets, slashing and broken, with no more than 1 stitches. The order line is skewed ≤ 2mm, and the empty head of the head and foot is ≤ 15mm. The upper and lower threads of the staple seam should be symmetrically locked without coils.
Sewing is a method of securing the book block by sewing it with a sewing machine along the opening of the book block. This kind of bookbinding method is suitable for sewing thin books of about 200 pages. It is a kind of bookbinding method that is often used in paperback books with a small number of pages. It is firmly connected and is not afraid of moisture.
More used in wet areas in southern China. The disadvantage of this method of bookbinding is that the speed of bookbinding is slow, and only stand-alone production is not easy to achieve linkage.
According to the provisions of the national industry standard CY/T28-99, the quality requirements for sewing book blocks are as follows:
The distance between the order line and the back of the book block is: 4 to 6 mm below 100 pages; 100 to 5 mm above 100 pages.
Number of needles: 16 open book cores, 17±2 needles; 32 open book cores, 12±2 needles, 64 open book cores, 7±2 needles; 16
The following needle spacing is 3~4mm.
The ordering line should be straight, without missing needles, out of sets, slashing and broken, with no more than 1 stitches. The order line is skewed ≤ 2mm, and the empty head of the head and foot is ≤ 15mm. The upper and lower threads of the staple seam should be symmetrically locked without coils.
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