How To Build And Use A Simple Caul

A forum containing tutorials pertaining to bowmaking tools - their use, maintenance, etc.
PaleoAleo
Registered User
Joined: 14 Apr 2003, 21:09

28 Apr 2007, 01:29 #11

I'm putting a copy of this into the Reference Area Ken. Nice job (as usual) on the photos, etc.

Tom
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toxophileken
Registered User
Joined: 15 Jan 2006, 04:55

28 Apr 2007, 10:02 #12

Thanks again...

Steve, your idea is interesting. I want to hear more about it...

Hope it will do some good there, Tom. Thanks.

Marc, that is the primary definition... But here is a quote from the Webster's Encyclopedic Unabridged Dictionary of the English Language (1989):
Quote:
Caul (2): n. a form or plate for pressing a veneer or veneers being glued to a backing or to each other. [< F cale shim < G Keil wedge]


Would seem appropriate to laminated bows, at the least...

I have also heard it called a "form", but this is usually in the context of laminated bows, both natural and of modern materials.

I have heard the term "caul" used in wood working shows for the blocks of wood used between a clamp and a piece of work, to avoid marring it. Note the French and German words of possible origin in the above definition...

For bowmaking purposes, I would propose the following simple definitions, which reflect current use in "bowyerese", as far as I can tell:

Form: A piece of wood or other sturdy material shaped depending on desired bow profile so that laminations of wood and/or modern materials may be clamped into or against it, in order to give the shape of the form to the glued up bow blank.

Caul: A piece of wood or other sturdy material shaped in such a way that a bow or bow stave can be clamped against or into it during the heat straightening or belly tempering process, in order to impart the desired shape, and/or correct crookedness or twist.

Ken

[Edited to put quote in quotation bars. Ken]
[Edited to add missing word. Ken]
Last edited by toxophileken on 07 Feb 2008, 06:58, edited 1 time in total.
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Marc St Louis
Registered User
Joined: 14 Apr 2004, 09:08

29 Apr 2007, 15:06 #13

Thank you Ken. That is excellentMarc
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censu
Registered User
Joined: 19 Mar 2006, 22:15

29 Apr 2007, 18:47 #14

Great post Ken, a useful tool as I venture into the deeper waters of bow makingImage I must make one




Cheers




Censu "The Matchstick Maker"
Censu "The Matchstick Maker"
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Juri
Registered User
Joined: 27 Sep 2005, 05:24

30 Apr 2007, 09:34 #15

Thank you very much Ken!!
The side piece is is a really good idea.
Using aluminium foil is a genius innovation, worth of a Nobel price at least! I have also burned a back of a good bow. Masking tape protects also pretty good, but the sticky glue melts on the wood and its a nightmare to clean off. Image
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James Carmichael
Registered User
Joined: 27 Oct 2005, 02:50

30 Apr 2007, 21:01 #16

Not to be a nit-picker, but I would say that device is more accurately described as a form than a caul.
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toxophileken
Registered User
Joined: 15 Jan 2006, 04:55

01 May 2007, 03:16 #17

Yes, but the common usage hereabouts has prompted my attempt at a new definition for both form and caul, as regards to bowmaking (above).

Both are forms... Certainly. Perhaps it should be noted that:

"A Caul is a variation of a form, where the shape of a stave is modified with heat, rather than glued in."

Language is living, and changes with use (or misuse).

I thought it useful to have two words - one for forms used in lamination, and a different word used for forms used for heat correction. The fact is, both words could be used interchangeably (going by the secondary definition from Webster's quoted above, and the French and German origin words).

A separate definition is probably only useful to us bowyers...

Ken
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tqpotia
Registered User
Joined: 19 Aug 2005, 21:01

02 May 2007, 08:01 #18

Thanks, Ken for explainations and for definitions.

Steve, your steam chamber sounds interesting. I`m sure Ken would be happy to help you to make a tutorial about it.

Regards,
Kosio
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toxophileken
Registered User
Joined: 15 Jan 2006, 04:55

01 Mar 2016, 04:43 #19

Apologies that the photos have disappeared. The photo host, ImageShack, seems to be down or to have lost the photos, or both. Not sure when I'll have time to put the photos back up.

Ken
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