Introduction:

The GWF Ribbon Shifter (prefolder) is a single web angle bar assembly incorporating an entry hard driven roll with crush slitters and nip trolleys, four angle bars and a page to page ribbon swing compensator. It is designed to slit the full web into two ribbons and shift the ribbons in order to produce additional pages with the combination folder.

Installation:

Designed to mount on a web press prior to a combination folder.

Application:

Upon entering the prefolder, which installs immediately before the press folder, the web is slit into two similar or dissimilar width ribbons. The ribbons may then be repositioned either one over the other, to either side or down the centerline of the press. One of the two ribbons is then compensated into the other for page-to-page registration before passing over the press former board. By stacking the ribbons, a number of common folds may be produced as well.

Standard Features:

• Designed  for maximum web width of 38” (965mm)
• One hardened entrance driven roller equipped with four nip trolleys and one pneumatic crush type slitter
• Four 2/3 width angle bars, 2.125" (54mm) diameter installed on linear type bearings with kip handles for fast gross movement
• Ribbon angle bars are motorized with ± 1/4" (6mm) sidelay movement
• One ribbon page to page swing type motorized compensators
• Standard mechanical drive connection from standard drive pick-up point including pin clutch to silence unit
• Standard support structure for installation at a proper elevation
• Symbology on electrical and pneumatic panels
• CE compliant

Optional:

• Remote for motorized movement
• Press station (entry)
• Electrical Drive
• Blower and heat exchanger

Remark: The full web must pass via the folder full cutoff linear compensator before entering the GWF Ribbon Shifter in order to adjust the print-to-cut of the 2 ribbons

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