Sheet-material associating – With printing – Associating and folding – with rotary printer
Patent
1995-10-30
1997-08-05
Nguyen, Hoang
Sheet-material associating
With printing
Associating and folding, with rotary printer
270 211, 270 42, 270 47, 493 5, 493 14, B41F 1358, B31B 100
Patent
active
056534280
ABSTRACT:
A phase control system for a fan blade assembly of a folder is provided which includes a fan blade assembly, a folded product transport assembly, and a control system. The fan blade assembly includes a first and second rotating fan blade assembly. The first rotating fan blade assembly has a plurality of first fan blades and has a first circumference. The second rotating fan blade assembly includes a plurality of second fan blades and has a second circumference. A product receiving area is defined at an intersection of the first and second circumferences such that only one of the first and second fan blades can occupy the product receiving area at any instant. The folded product transport assembly is provided for delivering folded products to the product receiving area. The control system includes a first sensor, a second sensor, and a fan blade assembly motor actuator. The first sensor detects an edge each folded product as it passes a first position and outputting a first signal indicative thereof The control system then estimates a first instant at which each folded product will reach a reference position as a function of the output of the first sensor. The reference position is located in the product receiving area. The second sensor detects each first fan blade as it passes a second position and outputs a second signal indicative thereof. The control system then estimates a fan phase angle of the first or second fan blade which will occupy the product receiving area at the first instant as function of the output of the second sensor. The control system can then calculate a phase differential between the fan phase angle and a desired fan phase angle and alter the rotational speed of the fan blade assembly as a function of the phase differential. The rotational speed of the fan blade assembly can be controlled via the fan blade assembly motor actuator.
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patent: 4539002 (1985-09-01), Zak
patent: 4881731 (1989-11-01), Simpson-Davis
patent: 5082255 (1992-01-01), Brigante et al.
patent: 5112033 (1992-05-01), Breton
patent: 5123638 (1992-06-01), Mutunou
patent: 5242364 (1993-09-01), Lehmann
Bolduc Paul Raymond
Dufour Charles Henry
Heidelberg Harris Inc.
Heidelberger Druckmaschinen AG
Nguyen Hoang
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