The Solna F840 is a combination jaw folder intended for high quality folding. The F840 is specifically for headset commercial products.
The Solna F840 folder is specially designed for a Solna Commercial 800 heat-set press. It has a capacity for one or two webs, producing tabloid and quarter folded signatures and with the provision for an additional double parallel cross fold.

The main technical parameters of the product
Cut-off sizes:    578 mm (22 3/4 ")- B size
630 mm (24 13/16")- D size
Max. geared speed:      40,000 rph
Production speeds:
40,000 cph for tabloid folds and quarter page folds 35,000 cph for double parallel folds
Max no. of webs:   
Two - within the limitations of substance and fold noted below.
Overlaps:   Within ± 10 mm (± 0.40") on all products.
Pin distance:    Approximately 7.5 mm (5/16") from cut edge.
Register movements:   655 mm (25 ¾") total adjustment available.

Product Configuration Single
Combination jaw folder mechanism, 1:2:2(:1), maximum 2 webs
Quarter folding mechanism with automatic timing of the folding blade
Individually drive RTF roller with pneumatically operated nip rollers and slitter/perforator wheel
Longitudinal perforation device for the spine of the quarter fold product
Cross perforation device for the head of the quarter folded product
Conventional positioned long former with air in former bars and nose including blower Pneumatically operated nip rollers below former
Signature overlap adjustment on the run
Optic anti-jamming device and web severer
Delivery table with variable speed control for to set spine separation distance
Superstructure for the first web
Safety guards in accordance with the European Union Safety regulations (CE)

Options
Double parallel folder.
Perforation in the spine of a double parallel folded signature, adjustable while running
Longitudinal skip-slitting in the head of a quarter folded signature, driven
Tear-out perforation
Gluing device for broadsheet and quarter folded signatures, continuous or intermittent
Tape splicing kit
Superstructure for two webs
Superstructure for three or four webs in combi- nation with mirror-imaged and stacked printing units.
Automatic print-to-cut register control
Angle bar system with bay window
Angle bar system to slit one web into two ribbons, running over the former in a central position
Web severing and clamping device with web break detector.
Auxiliary Equipment: Sheeters and stackers can be delivered by any supplier that is approved by Solna Offset AB.
Solna / Quad Tech free-standing combi unit with web guide and silicone applicator for one web .