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U443 Plate Defect Or Something Else?

 
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Author Previous TopicReplies: 3 / Views: 156Next Topic  
Pillar Of The Community
United States
891 Posts
Posted 06/29/2021   9:33 pm  Show Profile Bookmark this topic Add gettinold to your friends list Get a Link to this Message
Hi

Came across this today and don't know what may have caused it. Any opinion appreciated.




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Valued Member
237 Posts
Posted 06/29/2021   9:49 pm  Show Profile Bookmark this reply Add patg23 to your friends list  Get a Link to this Reply
Not a crack die, which many people make that assumption. I know I did. Comes up quite often.
See here for info.
http://goscf.com/t/75619
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Pillar Of The Community
United States
891 Posts
Posted 06/29/2021   10:53 pm  Show Profile Bookmark this reply Add gettinold to your friends list  Get a Link to this Reply
patg23

Thank you for the response and link. I found Thomas Galloway's explanation and example in that thread extremely helpful.

"I call these guys die pinch creases

They are found on early 20th century rotary press issues. As the envelope blank is fed through the press, there is a line of maximum pressure that is exerted on the die (running from top to bottom). As that line passes over the die, the paper is pushed into the cavity formed by the head, pulling the paper into the center. Then as that line of maximum pressure narrows and moves out the bottom of the embossing die, there is too much paper and it forms a crease."


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Edited by gettinold - 06/29/2021 10:55 pm
Pillar Of The Community
United States
727 Posts
Posted 06/29/2021   11:46 pm  Show Profile Bookmark this reply Add Parcelpostguy to your friends list  Get a Link to this Reply
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