Attention lab rats: The Elmendorf Pro Tear Tester, a laboratory instrument that measures tear strength, turns 90 this year!
Thwing-Albert Instrument Co. designed and built the tear tester in 1921, and the company in West Berlin, N.J., had been making ever since.
The device is named after Armin Elmendorf, a mechanical engineer who invented the instrument, originally to test the tearing strength of paper. Over time, this test has expanded to include many additional standards to measure tear resistance of sheet materials, including paper, textiles, roofing products, films and foils.
The Spencer Impact Attachment allows the Elmendorf Pro Tear Tester to gauge the impact resistance of plastic films and packaging materials.
Tel. 856-767-1000, fax 856-767-2615, e-mail [email protected].