Abstract: A drafting apparatus having a linear edge with first and second wheel means associated with the edge to rotatably move the linear edge across a planar drafting surface and wherein the wheels are of differing diameter so as to have the linear edge move across an arc defined within a circle toward which the linear edge is always pointed. The center of that circle is the vanishing point as conventionally utilized with perspective drawing techniques.

Abstract: A valve which is substantially leak proof and resistant to road soil and grime comprises a collapsible sleeve and a pin member to prevent leakage, but which is effective to permit inflation and deflation upon movement of the pin so as to dislodge an enlarged end portion from contact with one end of the sleeve.

Abstract: An apparatus for measuring gas transmission through films and membranes comprises upper and lower staging sections with sample sites defined therebetween. The upper and lower staging sections have conduit means therein for communication with sample sites of transmitted gas and carrier gases.

Abstract: A packaging machine processes a continuous web fed from a roll to form a sequence of packages or bags preferably filled with a product during its formation and sealing. The bag is formed by folding the web and sealing two web edges together longitudinally and thereafter transversely processing the web to close and seal the package ends before cutting the package from the web. In processing the package, the transverse processing mechanism operates intermittently cyclically or upon demand to grasp the web, move it, seal it and selectively to cut it to produce optionally either individual packages or a web connected sequence of two or more packages.The transverse processing mechanism comprises a piston operated reciprocable member with links moving two jaws on opposite sides of the web together into engagement with the web.

Abstract: A web feeding system reels the web off a web roll in increments of predetermined length for forming a package by a braked web spool and dancing roller array to pass through a work station such as a printer for registration at package sealing stations. The web is yanked, one package length at a time, by a reciprocating web transit motivating member grasping and withdrawing the web from the roll on an advance stroke and synchronized to brake the roll and to prevent movement through the feed path upon the return stroke.

Abstract: This invention provides a packaging system for processing a web from a roll to fold it, insert a product and to seal it about the product to form the package. All web processing equipment is cantilevered to one side of a panel to permit ready replacement and feeding of a new web roll. Quick changeover features are also included for changing web and package size. The entire drive mechanism for pulling the web through the system is a motor driven reciprocating member grasping and pulling a length of web through the system for each programmed package.Preferably the web is of a thermoplastic material which can receive and display such products as peanuts, and other food products, hardware, and the like. All mechanisms are in the form of cantilevered members for passing the web through a feed path held stationarily in place on a single panel except for the single reciprocating drive member.

Abstract: The invention disclosed is directed to a packaging assembly including a body having an open channel for supporting a trough-shaped web having a product disposed therein; a cover cooperable with the body and the web to form a substantially air-tight chamber about the product, at least one of the body and the cover having a hole for aid in vacuumizing the chamber; means for moving the body and cover into and out of chamber-forming relation; and means operable within the chamber for sealing the web to form a sealed web package containing the product. A process for packaging is also disclosed.