The Crease

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SteelMyHeart85420
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The Crease

Postby SteelMyHeart85420 » Sat Dec 01, 2018 2:48 pm

Seems I've read/ seen the question asked before, and an answer given. I must be aquiring geezerdom, cause I disremember the purpose of the lengthwise crease between the bolsters on traditional pocketknife liners. Just strength/ stiffening? Someone wanna rattle the marbles loose, help me remember?
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jerryd6818
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Re: The Crease

Postby jerryd6818 » Sat Dec 01, 2018 2:52 pm

I have to confess my ignorance. I have no idea what your talking about. Would it be possible to provide a picture?
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Re: The Crease

Postby gsmith7158 » Sat Dec 01, 2018 2:58 pm

jerryd6818 wrote:I have to confess my ignorance. I have no idea what your talking about. Would it be possible to provide a picture?

I agree. For a moment I thought maybe it was a word puzzle. Went way over my head.
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Re: The Crease

Postby Beavertail » Sat Dec 01, 2018 3:30 pm

What They said ::shrug::

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Re: The Crease

Postby orvet » Sat Dec 01, 2018 3:32 pm

It opens the pocket just a bit at the top so the blades don't hit the liner.
I will post a picture on a bit.
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Re: The Crease

Postby whitebuffalo58 » Sat Dec 01, 2018 3:40 pm


thefarside
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Re: The Crease

Postby thefarside » Sat Dec 01, 2018 3:48 pm

A photo of the crease. Hopefully Dale's picture will be a little better.
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106_1376.JPG

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jerryd6818
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Re: The Crease

Postby jerryd6818 » Sat Dec 01, 2018 3:52 pm

Well, I'm going to need a picture. I read Rob's thread, looked at several knives and didn't see anything that looked even remotely like a "crease". ::uc::
----------------------------------------------------------------------------------------------------------------------------------------------
Even after Jim posting a picture, I don't recall ever seeing anything like that. Is that only on old knives or certain patterns?
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btrwtr
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Re: The Crease

Postby btrwtr » Sat Dec 01, 2018 4:27 pm

This die pressed crease is added for strength. It is much harder to bend the liner with this added.
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tongueriver
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Re: The Crease

Postby tongueriver » Sat Dec 01, 2018 5:18 pm

Learned something! :shock: I had noticed this phenomenon and thought it was a defect.

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Re: The Crease

Postby just bob » Sat Dec 01, 2018 6:31 pm

I've taken hundreds of knives apart and observed that some knives have this crease and others do not. I always thought it was due to the expansion / contraction of the handle material. Would have never guess it was designed that way. Thanks for posting.
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Re: The Crease

Postby peanut740 » Sat Dec 01, 2018 7:36 pm

It is to keep the blades from rubbing the liners.I don't think it is done on all patterns.
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Re: The Crease

Postby btrwtr » Sat Dec 01, 2018 7:43 pm

The knives I have seen this on always had the depression pointed inward toward the cavity. Given this I don't see how it would afford the blades more space to keep from rubbing, in fact quite the opposite. I've always thought it to be a structural strengthening method. The liners will lay perfectly flat against the handle material at the edges and bolsters. The recess created will be between the handle material and the liner.
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Re: The Crease

Postby Sharpnshinyknives » Sat Dec 01, 2018 8:16 pm

btrwtr wrote:The knives I have seen this on always had the depression pointed inward toward the cavity. Given this I don't see how it would afford the blades more space to keep from rubbing, in fact quite the opposite. I've always thought it to be a structural strengthening method. The liners will lay perfectly flat against the handle material at the edges and bolsters. The recess created will be between the handle material and the liner.



Most likely a crease in metal is for strength. That’s why the bed of a pick up truck is constructed of bent and creased metal and not flat sheet metal.
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SteelMyHeart85420
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Re: The Crease

Postby SteelMyHeart85420 » Sat Dec 01, 2018 11:08 pm

Yeah, shoulda posted a picture with that....Thanks for the responses, gents
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