Raised bumps over embossing?

[cryptic]

I would like to know why there are raised circular bumps above the embossing on this sewing machine oil bottle? I don't think it is braille..

 

[towhead]

Maybe they signify drops of oil? -Julie

 

[GuntherHess]

It originally said SPERM at the top. They peened that out when the company switched to petrolium based oil.
I have one around here where you can read the old embossing somewhat.

 

[cryptic]

Wow that is really interesting. I just checked my bottle again and I can not make out any letters at all under the bumps.

Thanks for the help!

 

[diggerdirect]

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[RED Matthews]

It originally said SPERM at the top. They peened that out when the company switched to petroleum based oil.
I have one around here where you can read the old embossing somewhat.

Thanks for showing this. I have seen a lot of peened out lettering but usually the mold repair man uses a round flat ended punch. I can see where this little ball tipped tool might have been better in the narrow lettering of the embossing.
Another chissel tool that was used a lot by mold makers before 1960 was a swagging tool that had an end about 5/32" by 3/4" length for a tip. This was used to swage the iron along a seam out toward the cavity whee the mold edges didn't match just right. This process was stopped in our company when I got the men to use the fuse welding tourch to build up the cavity edge. In both cases the mold repair man had to shave with a hooked shaving tool to evenly match the side seams of the clamped together mold cavity.
I have quite a collection of the chisels and tools that were used by mold makers to chip lettering and do spot repairs.
Thanks for pointing your bottle condition out to us. RED Matthews

 

[cowseatmaize]

I never understood the term to peen I guess. If the letters were raised on the bottle they were recessed in the mold. What was there to peen? I would think filling would be required. Peening to erase a word would make a worse mess that a few raised dots. Flattening less metal shouldn't make raised anything. It's the displacement thing that bugs me.
Oh well.

 

[cyberdigger]

Maybe they hammered the outside of the mold until the letters filled in..

 

[GuntherHess]

here is one I found.
If you hold it just right you can still read SPERM.

 

[cowseatmaize]

No clue, yes I'm clueless in many things. I guess it depends on the mold and it's composition. I know cast iron for the most part doesn't take well to be hammered on at all.[]