5. This distinct base scar now is easier to demonstrate than describe; select suction mark for a picture of the scar which exhibits the diagnostic „feathering“ that undoubtedly shows Owens device generation (exact same picture are under kept). This level was distinct towards suction process which feeds cup into the base of an Owens machine’s parison shape. (notice: a motion picture video revealing this process in action is related towards the bottom with this package.) Suction marks cannot be produced by feed and movement automatic machines (in other words. „gob feeders“) though a similar type tag without any feathering is induced of the parison/blank mildew and mold on most additional blow-and-blow machinery – such as as much as todays. Press-and-blow gadgets will often have a round valve mark-on the bottom but lack either the sucking or parison scars. In any event, the suction scar was never ever found on mouth-blown containers though suction scars are now and again known as a pontil scar from the unfamiliar. Understand machine-made section of the package angles webpage for additional info on these scratch. (notice: chances are that other types of suction situated automated bottle machines produced in European countries into the 1920s – and possibly after – in addition made a suction mark on the base of these merchandise [Pearson 1928]. However, a big majority of containers from inside the U. S. with distinct suction scratch comprise most likely Owens equipment produced.)
6. The existence of a circular valve mark-on the bottom of a bottle (typically a broad throat container or container) is positive proof of machine-made create by a press-and-blow machine.
Relationships notes: the above mentioned diagnostic attributes – human anatomy and base – are typical of machine-made containers made of the start of the automatic container maker days (1905) towards end of the years included in this site – the 1950s (Miller McNichol 2002)
7 . Machine-made containers generally have few or no bubbles into the cup additionally the thickness associated with the glass is usually a lot more uniform for the container when compared with mouth-blown bottles. This is also true of later machine made bottles, i.e. through the belated 1920s on. (Note: The appeal or absence of bubbles inside cup and relatively also distribution with the cup through the entire characteristic is certainly not a major element of either machine-made or mouth-blown bottles, though there are stronger trends .
Many processes may be effected with the body for the container after truly totally molded or free-blown and finished (for example. the lip produced) so as to make the container considerably proprietary and/or ornamental, like blob seals, applied colors labeling, engraving, and applied handles. One techniques (patination) is actually quality it self in the form of liquid, minerals, and time weathering the cup surface. The following areas manage these post-molding attributes (for example. after molding is completed, never to feel confused with a post-bottom shape).
Just number 2 and no. 6 provide for any system linked matchmaking potential and they’re somewhat basic – thicker mildew and mold seams (no. 2) and bubbles in glass (#6) normally indicates an earlier manufacture (pre-1930)
A blob seal, and is frequently merely known as a „seal“ is typically a circular or egg-shaped (additional types possible) disk of glass on the body, neck, or often neck of a bottle. The blob of cup alone is gently placed on the container with a few kind of appliance. The embossing had been established by pushing a little steel or clay seal with an intaglio design on the applied blob of glass while still hot, similar to the conventional procedure of securing a letter with hot wax. The inscriptions on blob seals comprise designated with different phrase, figures, or artwork like a persons private es, services and products, and/or a year. Blob seals comprise put on a bottle following blowing and finishing was complete. Blob seals will also be referred to as a „prunt“ or „prunts“ basically simple name for smaller blobs of cup applied to the outer lining of a glass item (light 1978; Jones Sullivan 1989; Van den Bossche 2001). Blob seals comprise also known as „drop seals“ by some glass brands (IGCo 1906).
