File:Can solderless seam cutaway.jpg
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This file has been extracted from another file : 57 Exposition Number - Page 21.jpg |
DescriptionCan solderless seam cutaway.jpg | Cutaway diagram of the "solderless seam" used by H. J. Heinz's canning process in 1909 to attach the can ends to the cylindrical body. From the materials for the Alaska-Yukon-Pacific Exposition of 1909, held in Seattle. |
Date | or earlier |
Source | [1] (see filename for exact location) |
Author | Could not be extracted automatically; most are anonymous or pseudonymous. Scanned by the Seattle Public Library. |
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Mechanical scan of a work that is in the public domain because of its age |
This image is in the public domain because it is a mere mechanical scan or photocopy of a public domain original, or – from the available evidence – is so similar to such a scan or photocopy that no copyright protection can be expected to arise. The original itself is in the public domain for the following reason:
This tag is designed for use where there may be a need to assert that any enhancements (eg brightness, contrast, colour-matching, sharpening) are in themselves insufficiently creative to generate a new copyright. It can be used where it is unknown whether any enhancements have been made, as well as when the enhancements are clear but insufficient. For known raw unenhanced scans you can use an appropriate {{PD-old}} tag instead. For usage, see Commons:When to use the PD-scan tag. Note: This tag applies to scans and photocopies only. For photographs of public domain originals taken from afar, {{PD-Art}} may be applicable. See Commons:When to use the PD-Art tag. |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 03:59, 21 December 2011 | 698 × 698 (174 KB) | Jbarta (talk | contribs) | clean up | |
04:41, 25 April 2009 | 701 × 705 (108 KB) | Dcoetzee (talk | contribs) | {{Extracted from|File:57 Exposition Number - Page 21.jpg}} {{Information |Description=Cutaway diagram of the "solderless seam" used by H. J. Heinz's canning process in 1909 to attach the can ends to the cylindrical body. From the materials for the [[:en: |
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