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Research dossier · History & Society

Jansen AG

Swiss steel and plastic company, founded by Josef Jansen of Aachen

Layered newspapers, civic records and oral-history reels arranged as chronological evidence
History and societyInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionOct 16, 2024
Entity authorityQ1682975
Source-derived summary

Jansen AG is a family-owned company that develops, manufactures and distributes steel profile systems for windows, doors and facades as well as plastic products for the construction industry. It was founded by Josef Jansen in 1923, starting with 6 employees.

The company started producing steel pipes in 1930. In 1955, plastic tubes were added to the range of products. Today, the plastic product portfolio includes systems for geothermal energy, building technology and piping systems. In 1997, a first new production site outside Switzerland was established in Dingelstädt, Germany. In 2021, Jansen AG decided to focus on steel products for windows, doors and facades, spinning-off its supplies for the automotive industry to Mubea.

As the exclusive licensee of Schüco in Switzerland and Liechtenstein, Jansen also offers architects and processors solutions made of aluminium.

In 2023, Jansen AG acquired Rino Weder AG, a company located in Oberriet SG as well. Through this acquisition, powder coating technology was added to its capabilities.

Editorial summary

Begin with the source’s own compact description: “Jansen AG” is swiss steel and plastic company, founded by Josef Jansen of Aachen. The dossier treats that line as a proposition to test through Jansen, Swiss and steel, not as a finished interpretation.

Editorial reviewA useful synthesis for locating the documentary relationships between formal authority, participants and affected communities. The current lead gives the account dated anchors—1923, 1930, 1955, 1997—that can be checked directly. The linked authority record independently contributes the date 1923-01-01. For this dossier, Jansen, Swiss and steel is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “swiss steel and plastic company, founded by Josef Jansen of Aachen” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

Chronology, provenance and viewpoint should be read together before a broad social or political interpretation is accepted. The source revision retrieved here is dated Oct 16, 2024. The linked authority identifier is Q1682975. VIAF identifies the subject as 131147822. 2 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1923, 1930, 1955 and 1997.

Critical limits

Later summaries often reconcile disputed chronology or motive more neatly than the contemporary record permits. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Compare institutional narratives with records created by participants and affected communities. Dates and formal titles are useful anchors, but not substitutes for context.

Best used for
  • Event chronology
  • Institutional context
  • Locating named record creators
Verify next

Contemporary correspondence, government or organizational records, oral histories and cited historical scholarship.

Three-step research path

  1. Establish the record: confirm the title “Jansen AG”, its source revision and the description used here.
  2. Expand the search: follow Jansen AG primary sources, Jansen AG archive and Jansen research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Jansen AG”?
  2. What chronology connects this entry to wider political or social change?
  3. Who created the surviving record, and for what administrative purpose?
Subject index

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Source & attribution

This entry incorporates text from Jansen AG” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.