Prototype. Chapter text drafted from the research notes and not yet checked at the archives. Images awaiting permission are marked.

Hartmut Scholz, "Arrangement for the Tufting of Carpets" (US3968758A)

Patent · checked at the source

Made by: Hartmut Scholz, Allersberg, Germany
Date: filed 1 Nov 1974; patented 13 Jul 1976 (German priority 13 Nov 1973, DE 2356585)
Number: US3968758A
Themes: Hand-tufting tools & the gun, Tools & equipment

View at the source Cited in chapter 9, notes 35, 45

Cite this source

Hartmut Scholz, “Arrangement for the Tufting of Carpets” (US3968758A), filed 1 Nov 1974; patented 13 Jul 1976 (German priority 13 Nov 1973, DE 2356585). patents.google.com/patent/US3968758A/en.

Research notes

Checked against the USPTO document: H. Scholz, "Arrangement for the Tufting of Carpets", No. 3,968,758, patented July 13, 1976; filed Nov. 1, 1974; German priority Nov. 13, 1973 (2356585). The US counterpart of the patent behind the Hofmann hand-tufting gun (see co-hofmann-handtuft). What it is: a pneumatic hand gun. A hollow needle pierces the backing and the yarn is carried through it in an air stream; the air inlet sits behind the thread infeed, and one synchronous drive works both the cutter and the needle lift. This is the cut-pile, air-fed principle of today's professional guns. Lineage: it cites Schauer (US 3,142,276, 1964), Elliott et al. (US 3,144,844, 1964), Wilkes (US 3,225,723, 1965), Mueller (US 3,389,667, 1968) and Looper (US 3,430,590, 1969). Schauer, Elliott and Mueller are already in this database, so the German gun builds directly on the American hand-gun patents of the 1960s.