The WEIDMANN History

From 1877 to present
1877V1 1877
Heinrich Weidmann acquires the old water-powered town mill in Rapperswil, Switzerland and establishes a pressboard and cardboard factory. He starts supplying insulating materials to the still young electrical industry.
1914V1 1914
Heinrich Weidmann dies without a successor. His company is taken over by management and townsmen of Rapperswil and transformed into a joint stock corporation ("H. Weidmann Aktiengesellschaft"). The ailing company acquires "Grüzengut", 4 hectares of land in Rapperswil, and builds a modern industrial production and office complex.
1923V1 1923
Close to bankruptcy, the company is acquired by a financial consortium under the leadership of Jean Tschudi–Klaesi, the owner of a small board mill, from Ennenda in the nearby Canton of Glarus. Tschudi&Cie AG produces specialty boards for nonelectrical applications, in particular stereotype matrix boards used in rotary printing.
1925V1 1925
The necessary restructuring is entrusted to Jean Tschudi's son, paper engineer Hans Tschudi–Faude. He positions H. Weidmann AG as a first class supplier of cellulose based specialty boards and components for the power transformer industry (WEIDMANN Electrical Technology), and later on moulded parts for industrial application from thermosetting material and thermoplastics (WEIDMANN Plastics Technology).

1930 V1

1930 V2

Plastic resin compounds, in particular Bakelite, have become fashionable. WEIDMANN is one of the first companies in Switzerland using this base material in compression moulding to manufacture machine parts for the spinning and weaving industry.

First production of insulation components from calendered pressboard. In 1937, Hans Tschudi invents "Transformerboard" (hot press dried insulation board mainly used for transformers).

During the Second World War, when export of high voltage insulation collapses, WEIDMANN survives thanks to its booming Plastics Technology, producing components from rifle shafts to housings for the domestic telecommunications industry.

Hans Tschudi travels to the USA to buy the first injection moulding machine.
1952V1 1952
An important breakthrough in Electrical Technology is achieved by installing WEIDMANN's first large size (3x6m) Transformerboard (T IV) machine in Rapperswil, Switzerland.
1968V1 1968
Dr. Felix Tschudi-Hubacher assumes management responsibility from his father. Tschudi&Cie AG is integrated in the WEIDMANN organization.
Convinced that export alone will not satisfy growing customer demand, Felix Tschudi starts an ambitious international expansion program for WEIDMANN’s high voltage insulation (ELECTRICAL TECHNOLOGY) business.
1970V1 1970
Procelis SA, Bourgoin-Jallieu, France (fabrication of insulation components), today WEIDMANN ELECTRICAL TECHNOLOGY S.A.S,  joins the WEIDMANN organization as Joint Venture/licensing partner and is finally acquired in 1976. Site was transformed into a conversion center in 2011.
1971V1 1971
EHV-Industries Inc. (today WEIDMANN ELECTRICAL TECHNOLOGY, INC.) in St. Johnsbury, VT, USA joins the WEIDMANN organization and will become the hub of ETBA's North American fabrication of transformerboard and insulation components/packages.

Start of a Licensing Partnership with Honshu Paper (today Oji Specialty Paper Co. Ltd.), Japan (until 2006).
1976V1 1976
Foundation of Systems Sales Representatives, Inc. (later WEIDMANN SYSTEMS INTERNATIONAL INC.) in St. Johnsbury, VT, USA, as resale and sourcing company for transformer equipment and accessories.
1978V1 1978
Foundation of WEIDMANN do Brasil (today WEIDMANN TECNOLOGIA ELÉTRICA LTDA.) in Diadema SP, Brazil. In 2007 fabrication of insulation components.
1981V1 1981
Takeover of Whiteley Ltd., (today WEIDMANN WHITELEY LTD.) Pool-in-Wharfedale, England, renowned for its paper specialties for electrical and non-electrical applications (e. g. calender bowl).

1988 V1

1988 V2

WEIDMANN Plastics Technology records first sales of its two-component cowl vent to the German automotive industry.

Acquisition of WEIDMANN Industries, LP in Fergus, ONT, Canada (fabrication of insulation components for the electrical equipment industry). Divested in 2008.

Foundation of Gallan & Associates, Strathfield, Sydney, Australia, as ETBA sales office. Closure in 2015.

The still growing group of business units is reorganized under a holding company. In 1994 it is renamed WICOR (WEIDMANN International Corporation) HOLDING AG.
1994V1 1994
Representative office for WEIDMANN Electrical Technology established in Kiev, Ukraine.

First Asian sales office for WEIDMANN Electrical Technology established in Singapore.

Establishment of Izo-Prod d.o.o., an insulation components workshop in Zagreb, Croatia.

Establishment of WEIDMANN SYSTEMS INTERNATIONAL LTD., ETBA's sales and sourcing organization, in Hong Kong and Shanghai.

WEIDMANN Technical Services, Inc. is established in St. Johnsbury, VT, USA, later merged into WEIDMANN DIAGNOSTIC SOLUTIONS INC.

1997 V1

1997 V2

First ETBA production site, TAIZHOU WEIDMANN HIGH VOLTAGE INSULATION SYSTEMS CO. LTD., established in Taizhou, Jiangsu, China, with a new production plant for Transformerboard.

Foundation of WEIDMANN TECHNOLOGIA ELÉTRICA DE MEXICO S.A., Saltillo, COAH, Mexico (fabrication of insulation components).

Divestiture of Tschudi&Cie AG's non-electrical specialty boards activities in Ennenda, Canton of Glarus, Switzerland. Conversion of the plant into a new WEIDMANN Plastics Technology production facility for automotive components (until 2009). Reopening of the plant converted into an ETBA production facility for laminated board and milled parts in 2010.

1998V1 1998
WEIDMANN Plastics Technology successfully incorporates micro-structures (nano-technology) in medical components used for analytics and diagnostics ("lab-on-a-chip").

First WEIDMANN Plastics Technology overseas production site, WEIDMANN TECNOLOGIA EM PLÁSTICOS LTDA., established in Piracicaba, SP, Brazil.

1999 V1

1999 V2

Opening of a new WEIDMANN Plastics Technology production facility for automotive components in Rüti, Canton of Zürich, Switzerland.

WEIDMANN Plastics Technology starts production partnership with Plasticos Brello in Huarte Pamplona, Spain.

Establishment of Weidmann Automotive-Engineering GmbH in Sindelfingen, later with offices in Munich. Merged into WEIDMANN PLASTICS TECHNOLOGY (DEUTSCHLAND) AG in 2006.

Malyn Paper Mill, (today JSC WEIDMANN MALYN PAPER MILL) large and renowned manufacturer of electrical and specialty papers in Malyn, Ukraine, joins the WEIDMANN organization. Establishment of the WEIDMANN Malyn Insulation Components production facility.


License contract with Govik, Electricals Pvt. Ltd., Mumbay, India (fabrication of insulation components).

2000V1 2000
Acquisition of Bruwag AG, Bad Ragaz, Switzerland, merged 2006 into WEIDMANN PLASTICS TECHNOLOGY AG, Rapperswil. Establishment of a new production plant with clean-room facilities for PTBA's Medical Division.

Acquisition of the US-Canadian transformer oil diagnostics and services group ACTI, Inc. (today WEIDMANN DIAGNOSTIC SOLUTIONS INC.), with headquarters in Sacramento, CA, and laboratories in Bensalem, PA, Indianapolis, IN, Houston, TX, and Calgary, AB, Canada.

Tecnidd, later renamed WEIDMANN ELECTRICAL INSULATION SYSTEMS (SHANGHAI) LTD., joins ETBA's Chinese resale organization.

Franziska Tschudi Sauber assumes management responsibility from her father.

Acquisition of Avery Dennison's Electrical Paper Division, Framingham, MA, and O'Fallon, MI, USA (today WEIDMANN ELECTRICAL TECHNOLOGY INC.). Fabrication of specialty crepe and diamond dotted insulation paper.



Opening of an engineering office (WETAG) in Milano, Italy. Relocated to Chiasso, TI, Switzerland, early 2008.

2003 V1

2003 V2

Foundation of WEIDMANN PLASTICS TECHNOLOGY (DEUTSCHLAND) AG and establishment of a production plant in Treuen, Saxony, Germany. Expanded continuously, latest in 1010.

Foundation of WEIDMANN PLASTICS TECHNOLOGY NORTH AMERICA INC. Establishment of a production plant in Auburn, AL, USA.

WEIDMANN diagnostic solutions acquires the former Siemens Burlington/Toronto, ON, Canada, laboratory.

ETBA sales office established in Ansan, South Korea.

Opening of a WEIDMANN Tecnología Elétrica plant in Porto Alegre, Brazil. (Fabrication of insulating components). Closed in 2010

Opening of a new WEIDMANN Diagnostic Solutions laboratory in Lake Hamilton, FL, USA.

WEIDMANN Tecnologia Elétrica moves from Diadema to Piracicaba, Brazil, into new production and office facilities shared with WEIDMANN TECNOLOGIA EM PLÁSTICOS LTDA.

Bad_Ragaz_2 2008
Opening of  new WEIDMANN Diagnostics Solutions laboratory in Baton Rouge, LA and Waukesha, WI, USA.

Expansion of the WEIDMANN Plastic Technology's Medical Division plant in Bad Ragaz, Switzerland, thereby doubling its clean-room facility.

Inauguration of the expanded ETBA plant in Rapperswil, Switzerland (second bay housing a new transformerboard machine).


Takeover of laboratories for WEIDMANN Diagnostic Solutions in Denver, CO, USA, Burlington, ON, and Montreal, QC, Canada.



Inauguration of ETBA's new production facility for specialized ultra high voltage insulation components in Jiaxing, Zhejiang, China.


Acquisition and opening of new WEIDMANN Diagnostic Solutions laboratories in North Canton, OH, USA, and Saltillo, Mexico.



Opening of a new fiber and board laboratory for ETBA in Rapperswil, Switzerland.


Opening of new WEIDMANN Diagnostic Solutions laboratory in Canton, MA, USA.




Inauguration of the upgraded ETBA transformerboard maschine in St. Johnsbury, VT, USA.


Opening of the new integrated plant for electrical paper products in Urbana, OH, USA (including closing of the Framingham, MA, and O'Fallon, MI, USA, plants).




Opening of the ETBA production plant for insulation components in Gebze, Turkey.


Sale of PTBA's division Automotive & Industrial to the American TECHNIPLAS-Group.



Establishment of a Sales Company (JV) in Tokyo, Japan.

2015 Samobor sw

Foundation of WEIDMANN IZO-PROD d.o.o. and opening of second production site in Samobor, Croatia.

2015 Wuhan 3sw

Takeover of SIEMENS Wuhan insulation components workshop by WEIDMANN ELECTRICAL TECHNOLOGY (JIAXING) CO. LTD.

2015 WTSW1sw

Establishment of an ETBA JV, WEIDMANN TRANSFORMER SUPPLIES BV, Wijchen, Netherlands, for insulation components.


WEIDMANN TECNOLOGIA ELÉCTRICA LTDA. moves from Piracicaba, SP, Brazil, into new production and office facilities in Valinhos, SP.