UPDATE 2-Riva aims to take Dutch printer Roto private

* Offer of 14 euros per share

* Has 55 percent acceptances, plus Riva's 15 percent stake

* No redundancies

* Share rises 20 percent (Adds share reaction, advisors)

AMSTERDAM, Sept 8 (Reuters) - Riva Investments plans to take Dutch printer Roto Smeets (RSDB.AS) private through an agreed buy-out bid at 14 euros per share, the companies said on Wednesday, valuing Roto at some 46 million euros.

The share jumped 20 percent at the opening to 13.8 euros.

The bid will be launched via Printing Holding, a Riva vehicle, and will be either for cash or for one depository receipt in the vehicle per Roto shares. Riva said the offer carreid a 39.2 percent premium to the average share price for a month prior to April 6 when it first indicated a bid.

Riva will contribute its 15 percent stake and said Shatho Beheer, Marsala, Stichting Familiefonds Nexgen and other shareholders, which represent 55 percent of the capital, were also commited to tender their shares in exchange for depositary receipts.

Riva in April offered 12.50 euros per Rota share.

Rota Smeets closed at 11.50 euros on Sept 7 and has made a 14.3 percent gain so far this year. It has a market capitalisation of 37.34 million euros ($47.59 million).

ABN Amro is financial advisor to the offeror and ING to Roto Smeets.

Roto made a first half net loss of 5.3 million while its sales fell to 161.8 million from 186.2 million.

($1=.7846 Euro) (Reporting by Marcel Michelson; Editing by David Cowell)