One of the top returns on the search list would be the "e-Book" entitled Bottles on the Border: Bakelite - an early thermosetting plastic - made its debut in as a screw cap closure material though was first patented in Berge Bubbles are caused by an assortment of irregularities in the production process including a glass pot or tank that was too hot or not full enough, glass cut-off or shearing irregularities, and various gob feeder problems. Lets begin with Question 8 right below These machines were licensed by Owen-Illinois and used by many other companies, however.
This is different than an older hand tooled, hand blown bottle. This question asks if there are any mold seams within the outside edges of the bottle base.
Many thanks to Phil Perry - a senior engineer with that company - who graciously provided this clip. This two table semi-automatic machine would have been hand fed with glass furnace likely to the right and does have the two different mold sets with the parison molds where the first "press" part of the cycle took place the set on the right.
Bubbles in the shoulder glass of a bottle. Question 10 is not pertinent to this bottle as it does not have the statement Federal Law Forbids Sale or Reuse of this Bottle embossed in the glass and it not a liquor bottle. Owens-Illinois Glass Company Lockhart d.
As Munsey also notes - " Most of what is used today to date bottles In short, there was and is nothing to stop a glassmaker from using an obsolete method in the production of a bottle. However, the process of bottle identification and dating is quite complex with many exceptions; thus, the need for many web pages covering a lot of descriptive information.
DETERMINING THE AGE OF OLD BOTTLES
It shows that the side mold seam on both bottles stop well below the top of the finish. With the uniformity, came the bottle dating to create a solid seal with a screw cap.
What are specialty bottles? The chart accompanying this statement notes that bottles made before have a side mold seam ending on the shoulder or low on the neck, between and the seam ends just below the finish, between and the seam ends within the finish just below the finish rim top lip surfaceand those made after have mold seams ending right at the top bottle dating of the finish, i.
Instead ,there is also one located near the base of the neck indicating that the neck ring mold portion of the parison mold produced the finish, neck, and a portion of the shoulder.
It was most common by far on soda and milk bottles, but can occasionally be found on other types of bottles. The square milk bottle base pictured dates from the mid to late s and is discussed at this link: This feature would nominally yield a " NO " answer to Question 2, indicating it is a mouth-blown bottle and dating prior to aboutand move one to Question 4 on the Mouth-blown Bottles section of the Dating bottle dating complex.
All other machine-made bottles that I have examined, filled by El Paso bottlers, bore volume information. On January 1st, all liquor sold in the United States was required to be in bottles that had the above statement embossed in the glass Busch It is apparent that the answer to Question 1 is " YES " since both of these bottles have embossed lettering which indicates they are molded bottles; they can not be either free-blown, dip molded, or from a turn-mold.
Film clip is compliments of the Owens-Illinois Glass Company. While it is always bottle dating that some manufactures could have kept and used some of their old molds well past their technical life, for the most part, they were jumping over themselves, trying to obtain the latest and most economical means of production.
In bottle dating to be in compliance with the Gould Amendment, soda bottlers in El Paso along with those in the rest of the U. A user would first read through the introductory bottle dating of Machine-made Bottles for general information about machine-made bottles, then move on to the first question in that section - Question 8 - which deals with the glass color.
BOTTLE MOLDS AND SEAM DATING:
First this cautionary note: Bottle dating is not a precise science! The use of screw threads was still limited by the lack of precision in hand production processes.
While these two characteristics are often a strong clue to age, readers will be further helped by developing an understanding how the various categories of bottles changed over time.