The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 1981
Filed:
May. 19, 1980
Applicant:
Inventor:
James K Thomas, Mexico, ME (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ; B65H / ;
U.S. Cl.
CPC ...
2421561 ; 24212951 ; 2421298 ; 242134 ; 242141 ;
Abstract
A thread keeper to prevent undesired unwinding of thread from a spool. The unit comprises a channel shaped element with the mid portion paralleling the axis of the spool and the two arms straddling the ends of the spool. The arms have short projections that enter the ends of the cylindrical bore through the spool whereby the spool can rotate within the keeper unit. The space between the mid portion of the keeper and the thread on the spool is filled with compressible friction applying material that expands to be in continuous braking engagement with the thread as it is pulled and unwound from the spool.