Sheet rotator/folder SRF-100

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The optional high-performance SRF-100 rotator/folder consists of an SR-100 rotator and an F-100 folder. It may be used with the Smart-binder to rotate sheets 90 degrees (from long-edge leading to short-edge leading), then buckle-fold sheets to produce small format booklets, from a normal width (440-460mm) web in-line with a web-cutter. This allows the normal ‘wide’ web to be used when making small format booklets, instead of having to change to a ‘narrow’ paper web.

For example: to produce A5 booklets, oversize A3 sheets with 8 pages on each printed sheet are delivered long-edge leading. The rotator/folder then rotates each sheet 90-degrees to short-edge leading. Each sheet is then folded in half to give an oversize A4 section with the folded edge leading. The folded sections are then fed into the Smart-binder, and processed normally.

Since sheets are folded into sections before entering the Smart-binder, and books can only be made from whole sections (8-pages per section), it is only possible to make books in multiples of 8-pages, instead of the normal 4-page increments.

Folded sections are more bulky than flat sheets, so this technique may also reduce the maximum number of pages in the book.

Both the rotation and folding processes may be deactivated when sheets need to pass through the SRF-100 without rotating or folding.

The SRF-100 folder (F-100) may be fitted with optional anti-static bars to reduce the static charge on the sheets delivered to the Smart-binder.

When using ISG gluing with pre-folded sheets a second cold-gluing nozzle must be installed in the folder (to place a line of glue inside the folded sheet). Use option FGS-100/FGS-101.

It is not recommended to use the SRF-100 for sheet rotation if sheet weight is less than 60 gsm, or if sheet input rate is higher than approximately 300 sheets/min. The SRF-100 may be used at higher speeds when just F-100 buckle-folding, not rotating. The maximum web speed then increases to approximately 180 meters/min.