In a high - speed offset press, the line speed of the ingot teeth is very high. Take the j2204 offset printing press as an example. If the printing speed is 10,000 sheets per hour, 2.77 sheets need to be passed per second. Therefore, it is required that the weight of the chain teeth should be light, the arc transition should be large, and the number of chain rows should be small, which is conducive to high-speed printing.

The number of chain teeth and the length of the receiving chain depend on the overall layout of the printing press. Paper chain short machine compact, and more economical; The longer chain allows sufficient time for the ink to set and provides sufficient space for the drying, anti-stick spraying and printing mechanism. For example, Js2101 type offset press ingot bar row has 4 rows, H4880-01 type offset press has 7 rows, J2203A type offset press has 13 rows.

The paper teeth row shaft on the paper receiving chain is generally installed on the bracket, and the bracket and the chain have several forms of connection. One is to hold the paper shaft bracket mounted directly on the chain link. The paper holding tooth movable tooth piece rotation axis 1 and the paper holding tooth pad axis are arranged in the hole of the bracket. The bracket is fixedly connected with one pin (extended) of the sleeve roller chain, and the sleeve is rolled on the other pin of the chain with a sliding block, which can slide in the guide groove on the bracket. Because the chain in the linear part of the movement, 3, 4 two pin shaft wheelbase for chain pitch twice (2t), and the chain in the sprocket meshing, the two pin shaft wheelbase is less than 2t, slider - guide groove structure can adapt to the needs of two pin shaft wheelbase change, so that the chain and sprocket always correct engagement. This kind of structure is simple and widely used in domestic machines. However, because the chain bears the weight of the paper teeth row, and the force of the chain is larger when the teeth are opened, the chain wears quickly.