US 5,016,863 AGranted

Adjustable longitudinal folding former system

AssigneeMAN Roland Druckmaschinen AG

InventorHubert Birkmair

Life of this patent

Estimating the term…

Loading patent…

Abstract

To avoid the necessity to readjust rollers (3; 6) located in advance of and downstream of a moving web (1) passing over a folding former (4; 4a, 4b) upon adjusting the folding former, the former is retained on a holding structure (11, 12, 14, 15) which is pivotable about a pivot point (S) located at the side of the former which is at the side of the web passing over the former, and opposite the side of the web facing the former, so that the pivot point is located at the side of the former which faces the web. Upon pivoting the former, the tip (5) will move only over a slightly distance vertically with respect to the axes of rotation of pull-off rollers (6), and the back edge (5) will change only slightly with respect to tangential position related to the web supply roller (3). The folding former may be constructed as a split former (4a, 4b) in which the split parts are individually adjustable to change the angle (.alpha.) of the folder parts.

Claims9

Dependent claims

Longitudinal folding system for folding a traveling web (1), particularly a printed web received from a rotary printing machine, having

a frame (7);
a folding former (4, 4a, 4b) having triangular or funnel shape and defining ax apex (5), a center or ridge line (10) and a transversely extending base line (25);
a supply roller (3) guiding the web (1) towards the former (4);
a pair of pulling rollers (6) pulling the web from the former (4).
said former (4) being pivotably located with its apex (5) close to the nip between said pulling rollers (6) and its base line (25) close to the supply roller (3) and essentially parallel thereto;
and
pivotable support means (11-15) coupled to the former for pivotable movement with respect to the frame, and pivoting about a pivot point or axis (S),
wherein, in accordance with the invention,
said pivot point or axis (S) is located at the side of the web passing over the former (4) which is opposite the side of the web facing the former, whereby said pivot axis (S) will be located at that side of the former which faces the web, and
wherein the pivot point or axis (S) of the former (4) is positioned approximately at eh intersection of two theoretical straight lines (8, 9),
a first one (8) of said lines extending through the base line (25) at the center line (10) of the former and perpendicular to the angle of the inclination angle (.beta.) of the former;
and
a second one (9) of said lines extending vertically from the apex (5) of the former.

10 more elements

Dependencies are inferred from the claim text.