Double-Former Folder

An in-line folding device used on publication and commercial web presses which creates only one former fold which serves as the backbone for a printed product. It is called a double-former folder because it has two former boards which can deliver twice as many signatures as a regular former folder. A double-former folder usually operates on the same principle as a ribbon folder: a blade slits the web into two halves, each of which is sent through a former folder to create two sets of printed and folded signatures. A double-former folder is also known as a form-and-cutoff.

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