RED Matthews
Posts: 2394
Joined: 8/2/2008 Status: online
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Hello again. I have looked over your drawing and arrived at this conclusion. The mold seam that you show would have been formed in the final blow mold. The parison shape of the glass would have had a seam, but that seam would have reheated and disappeared in the stretching of the parison to the final blow mold surfaces. I have to come to the conclusion that the ABM was early but the seam lines almost indicate that the machine was of the Emhart I-S type. I have a drawing sketch but I don't really know how to put it here. The appearance of the bottles bottom with that big embossed push-up bottom makes me think it was not made on the Owens type of machine motions. In the first place, a Blow and Blow bottle on the Emhart type of machine would be made with the parison shape inverted and the finish would be formed under the parison cavity. On the Owens Type of machine the parison is made upright with the finish on the upside of the blank mold (the parison shaping mold). They often shaped part of the finish in the top neck cavity of these molds. I would have to go ding in some of my Owens files - but I assume the top sealing surface was formed with an inverted guide ring and a plunger through the center of it. The hot molten metal (glass), was sucked up into the parison cavity with vacuum and then sheared off, on the bottom of this parison mold; This shear off created a ring in the center of the glass bottle bottom, that shows the sweep of the shear blade on the finished bottle's glass botom. This Owens cut off mark is sometimes called a pontil [Not-So]. The parison is transferred from the blank mold to the final blow mold by a holding arm where the blank mold opens the machine turns and the parison is than closed in the cavity of the final blow mold. You can go on Bill Lindsey's SMA.org homepage and watch this machine do its stuff. Well - I know this doesn't help much, but I think it is a nice transition bottle and would be interested in it for that reason. RED Matthews
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