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US 4,907,399 AGranted
Automatic packaging method
AssigneeOmori Machinery Co., Ltd.
InventorMasaru Yamamoto
Life of this patent
Estimating the term…
Abstract
A band-shaped film of a suitable plastic material is conveyed and is formed into a tubular shape during its travel, articles to be packed are conveyed and transferred into the tubular film at intervals and the tubular film is sealed at a predetermined pitch into individual bags. The tubular film is fed at a substantially constant speed and each article is conveyed at about the same speed as that of the tubular film during at least a period in which the article is transferred into the tubular film.
Claims3
An automatic method of packaging articles, said method comprising:
- conveying a band-shaped film and forming said band-shaped film into a tubular shape during travel thereof;
- conveying articles to be packaged and transferring said articles into said tubular film, said conveying comprising advancing said articles by abutting trailing ends of said articles with flights connected at predetermined equal intervals to a conveying;
- sealing said tubular film at a predetermined pitch to thereby form individual bags having therein respective said articles;
- said equal intervals between adjacent said flights being different from said predetermined sealing pitch;
- maintaining the conveying speed of said film substantially constant;
- and
- controlling the speed of movement of each of said articles to normally be different than said conveying speed of said film, thereby to compensate for the difference between said flight interval and said sealing pitch, and adjusting said speed of movement of each said article to be equal to said conveying speed of said film during a period of time when said each article is transferred into said tubular film.
4 more elements
Dependencies are inferred from the claim text.