Hot answers tagged tying-knots-kosheir
One does not tie a "permanent" knot on the tachrichim (burial clothes) in order to show that the death is not permanent. That is, the person will get up at techiyas hameisim (resurrection of the dead) after the mashiach comes. Additionally, the knots are this way so as not to hinder the dissolution of the tachrichim with the body. The chevra kadisha that I ...
Halachipedia citing O.C. 317:5, and other sources, says: A bow-knot, slipknot, or a single-knot isn’t a true Kesher-bind and is permissible even if it does remain in place for a while.  For example: a ribbon on a gift, a single bind on a shopping bag or garbage liner. It is permitted to tie a slip knot or bow without a underlying knot even ...
As @NoachmiFrankfurt mentioned above, and suggested I convert into an answer: Here's a partial answer: The MMA madrich gives requires a double-dalet knot http://www.moreshesashkenaz.org/en/guide. Furthermore, there are Sephardim, such as the London community, who also maintain this practice: https://sites.google.com/site/londonsephardiminhag/tephillin
Rav Shachter has said (and written in Nefesh HaRav) that Rav Soloveitchik consistently advised students to follow their father's minhagim, with two exceptions: (a) eating in the sukkah on shmini atzeret, and (b) the shape of the knot in the tefillin shel rosh, where he thought that the alternative view (i.e., not eating in the sukkah and the double dalet) ...
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