[rollei_list] Re: Refurbished Rolleicord and re-stitching
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Thu, 8 Jul 2010 10:41:37 -0700
----- Original Message -----
From: "Emmanuel Bigler" <Emmanuel.Bigler@xxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Thursday, July 08, 2010 9:59 AM
Subject: [rollei_list] Re: Refurbished Rolleicord and
re-stitching
From Richard Knoppow about restitching a leather case :
Restitching is not at all difficult. There are a
couple of approaches, one is the "double needle" method,
which pretty much duplicates machine stitching,
I have fabricated leather cases for lenses using the
manual double needle method. This method yields something
which is actually different from what a machine does. In
French we call it "saddler's stitching" (couture au point
de sellier).
In principe the needles shoud not be sharp and you should
pass both needles at the same time through the pre-punched
leather. So this is technique, in principle, is perfect
for restitching an existing case with exitsting holes...
provided that the leather is not rotted as Richard says.
Doing so you get a much stronger stitch than with a
machine. With a machine, both threads pull on each other ;
when one thread is damaged, the whole stitch can go off
very easily whereas the manual double-needle point is much
more wear-resistant, both threads are in fact independant.
I should try to make pictures of my home-made leather
cases and post an image somewhere.
--
Emmanuel from France
There are two ways of using two needles and two
threads. The machine type in the machine type stich the
first thread is passed through each hole and brought around
the second thread and back through the hole to form a loop
which is locked by the second thread. The second needle
never goes through the leather, rather it is used to pass
the second thread through the loop. This is a cumbersome
process to do by hand. As you point out if either thread is
broken at any point the whole thing comes apart. The second
method, and I think the one you are using, can be done with
a single needle and thread. The two needle method is to
start at one end and pass each needle and thread through the
hole from opposite sides and then back again at the next
hole. This forms the stitch into a sort of running
figure-eight all down the seam. It can be done with a single
needle by stitching one way and then coming back the other
way with the thread on the opposite side of the leather. The
difference is that the two needle method produces a
completed seam in one pass. Neither method is particularly
difficult especially if the leather is already perforated
and the original perforations are usable. For case repair
where only the stitching need to be replaced heavy sewing
needles will suffice, where new holes must be made special
leather stitching needles will be very helpful. Leather
working is a common hobby so materials and information about
techniques are readily available.
BTW, where an adhesive is needed for leather I
recommend a brand of contact cement called _Barge Cement_. I
think Tandy carries it or something about the same.
--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@xxxxxxxxxxxxx
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