Blisters

About: Blisters is a research topic. Over the lifetime, 980 publications have been published within this topic receiving 16229 citations.

A study of blistering in Mylar due to H+ ion implantation

Abstract: A comprehensive study of blistering of Mylar under 100 and 250 keV H + -ion implantation has been made. The conversion of blisters to “Karnavalaya” and vice-versa due to electron beam excitation during scanning electron microscopy of the implanted sample is found to be an analog of similar events taking place during ion implantatio. This results in the development of complex blisters. The critical dose for blistering is found to be dependent on the residual surface stresses. It is higher when the stresses are compressive as when tensile. The gases emitted during ion implantation were analysed by a residual gas analyser. CO and CO 2 are found to be the main components resulting from radiolysis of the Mylar due to H + ion implantation. However, the emission of H 2 in this case remains inconclusive due to various experimental limitations. Various observed features on the Mylar surface after ion implantation were successfully explained on the basis of a proposed model of blistering based on the micro-structure of semicrystalline polymers.

Culling method for blister-pack production line

Abstract: A continuous and elongated blister-pack strip having transverse rows of blisters of which some are empty and most are full is transported through a stamping station. Upstream of the stamping station whether any blisters entering the stamping station are full or empty is sensed. In the stamping station only sections all of whose blisters are full are stamped out of the strip from between the edges thereof while leaving the edges flanking the stamped-out section intact so that sections of the strip having at least one empty blister leave the stamping station attached to the strip edges. The stamped-out sections are transported away from the path at the stamping station. Spaces in the strip between blisters still attached to the strip edges are then detected and the entire strip is transversely cut only between the respective blisters into pieces each including at least one row of intact blisters.

Sealing apparatus with sealing load control

Abstract: An apparatus for sealing a cover film to a blister film having blisters holding respective small objects has a feed roll rotatable about an axis and formed with an array of radially outwardly open recesses arrayed like the blisters of the blister film. The blister film passes over the feed roll with the blisters in the recesses. A sealing roll is rotatable about an axis generally parallel to the feed-roll axis and presses the cover foil down against the blister foil on the feed roll. The feed roll is rotated to pull the films in a travel direction between the rolls so that the cover film is sealed to the blister film between the blisters thereof. A sensor detects movement of the sealing roll transversely of the feed-roll axis. A controller generates an output when the detected movement exceeds a threshold.

Blister assembly for inhalation device

Abstract: A blister pack for an inhaler, the blister pack comprising a blister support ( 10 ) with a plurality of blisters ( 11 ), each blister ( 11 ) being hermetically sealed by a closure layer ( 20 ), the blister support ( 10 ) being in the form of an elongate strip, the blisters ( 11 ) being disposed one after the other along said blister support strip, said blister support ( 10 ) including two lateral profiles ( 15 ), one on either longitudinal side of said blister support ( 10 ), said lateral profiles being formed by alternating depressions ( 18 ) and projections ( 16 ), each projection including an abutment surface ( 17 ) for displacing said blister pack in accurate manner each time said inhaler is actuated, each abutment surface ( 17 ) being connected to the adjacent abutment surface ( 17 ) via a slide surface ( 19 ) formed by each depression.