the device (system of rolls) that provides/feeds paper necessary in the splicing process (as also described in German in the wikipedia article quoted in your notes.
Hope this helps.

http://www.conti-online.com/generator/www/com/en/continental...
4-Roll Accumulator

The accumulator station regulates the continuously extruded strip on four overhung-mounted and individually driven diverter rolls during the operating sequence at the apex applicator.

http://www.butlerautomatic.com/products/splicers/SP3/index.h...
The Automatic film splicer stops the expiring roll of film at the preset splice diameter, the bagger is then fed from the integrated accumulator while the expired web is joined to the prepared leading edge of the new roll. Next, the new roll is brought up to speed and the accumulator is refilled, eliminating any stops in the production process for roll changes.



http://webstore.ansi.org/ansidocstore/product.asp?sku=TIP 03...
The splicer has been designed to permit a change in roll stock width or grade without having to slow down to idle running speeds. During normal operation of the splicer, the paper unwinding from a roll stand passes up and through the splicer and into the single facer or glue machine. The paper passes through a splicer head and idler rolls, and around either a set of dancer rolls or through a driven carriage assembly. The dancer rolls (stationary type splicer) and the driven carriage assembly (driven type splicer) provide the method by which the paper from the newly spliced-in roll is permitted to run and accelerate up to the corrugator's running speed without having to stop or slow down the corrugator.

http://www.idspackaging.com/packaging/europe/automatic_film_...
integrated accumulator