Printing – Rolling contact machines – Rotary
Patent
1986-11-12
1988-06-07
Eickholt, E. H.
Printing
Rolling contact machines
Rotary
26 99, 162271, 226192, B41F 1356
Patent
active
047489090
ABSTRACT:
To simplify a transverse stretching apparatus and provide rollers which do not require a change in the respective axes of rotation, two rollers are located adjacent, parallel, and spaced from each other, in which each of the rollers have outer cylindrical sections of respectively different diameters, with an intermediate essentially conical section, merging smoothly with the outer cylindrical section. The rollers are so located that the smaller diameter circumferential section of one of the rollers (4) is opposite the larger circumferential section of the other roller (5), and, when in essentially axial alignment, define a neutral position in which the sums of the diameters of the rollers at any axial plane passing transversely through the axes of rotation, will be the same. Upon relatively axially shifting the rollers with respect to each other (compare FIGS. 1 and 3), the sums of the diameters of the rollers at the still transversely aligned cylindrical portions will remain the same, but the sum of the diameters at the shifted intermediate portions will either increase or decrease, in dependence on the direction of shift, thereby providing increased or decreased stretching force to the intermediate range of the web looped about said rollers.
REFERENCES:
patent: 813288 (1906-02-01), Hancock
patent: 920122 (1909-05-01), Farnworth
patent: 4223426 (1980-09-01), Demiere
patent: 4693587 (1987-09-01), Shigenobu et al.
Eickholt E. H.
M.A.N. - Roland Druckmaschinen Aktiengesellschaft
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