Perfect binders are used in the process of either sheets o r signatures (a sheet with mult iple pages printed and then fol ded) are bound together using a glue with a wrap-around cover which creates a square-shaped s pine.
There are many dif ferent perfect binding types, a ll called soft cover books. Mai nly you can split them in sewn soft cover books and normal sof t cover books. A sewn book will first be sewed and then fed in to the binder to get his cover.
For normal perfect boun d books you have to gather the book block, which you can do wi th an in- or off line gatherer. Then you go through a milling station to get a rough surface in order for the glue to hold b etter, after milling you have s everal
options for spine prepar ation all depending to kind of glue and paper. After the milli ng you go apply the spine glue and side glue. This can be Hot melt, PUR or cold glue.
Mekes sells perfect binders mai nly from Muller Martini, Kolbus and Wohlenberg. There are many different models, variating in set-up time, production speed and sizes. From Muller Martini the Normbinder is still very po pular. It is designed in 1970
a nd build till 2000, a very stro ng build machine. Due to the mo dular design of Muller Martini we can modify perfect binder ma chines to the customer wishes. So we can add a gauzing station or change the glue system.
Three knife trimmers em>
Three knife trimmers are a type of cutting device ( similar to a guillotine cutter) comprising of three knifes, tw o parallel knives and one right -angle knife, used to trim thre e sides of a book simultaneousl y. You use three-knife-trimmers to cut
brochures, soft cover b ooks and bookblocks for hard co ver production. Change-over tim e and production speed are the two important factors to decide which trimmer you need. Most c omment manufactures are Wohlenb erg (44FM50, 44FS50, Trimtec 56 i, etc),
Muller Martini (Merit, Zenith, Orbit), Kolbus (HD 1 43P, 151P, 152P, 153P). Behin d a three-knife-trimmer you can place a delivery belt, or a st acker.