| 摘要 |
The invention is concerned with the field of devices for spread-applying liquids, and in particular, with a device and method for spread-applying glue on the spine region of a book. The technical problem to be solved was that of providing bookbinding machines which could spread glue controllably and evenly, and apply said glue on all the suitable locations for glueing and only there. The problem is solved by providing a device which has a pair of containment lateral sides arranged at extrusion nozzles and alongside the path followed by said book spines, said lateral sides being movable to and away from each other and defining an extrusion chamber which envelopes both said spine and book edges adjacent it, and has a working chamber operative to supply said nozzles with glue and being confined between two juxtaposed pressure elements which are movable together with said containment lateral sides.
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