Printing apparatus
OwnerMathias Mitterinventor
Life of this patent
Estimating the term…
Abstract
A plurality of sleeves extends through a printing-medium chamber; each sleeve has one or more openings through which its interior can communicate with the chamber. In each sleeve a plunger is reciprocable between a retracted position in which the opening is exposed so that printing medium can enter from the chamber, and a printing position in which the plunger closes the opening and the printing medium in the sleeve is applied to a workpiece. A drive reciprocates the plungers individually. The chamber may be pressurized to cause more rapid entry of printing medium into the sleeves. The quantity of printing medium applied during each plunger reciprocation may be selectively varied.
Claims28
A printing apparatus, comprising means for supporting a web to be printed;
- means forming a chamber for a body of printing medium and in part bounded by a wall juxtaposed with said supporting means;
- a plurality of sleeves extending through said chamber and each having an open end facing said supporting means and a port inwardly spaced from said open end by a predetermined distance and communicating its interior with said chamber;
- a plurality of plungers each reciprocably received in one of said sleeves and each having a leading end, said plungers each being movable between a retracted position in which said leading end at least in part uncovers the associated port so that printing medium can enter the sleeve and an advanced printing position in which said leading end is located forwardly of the associated port and the plunger closes the same;
- and means for reciprocating said plungers individually between said positions thereof.
An apparatus for printing on a web, comprising means for confining a body of printing medium;
- a plurality of plungers;
- means mounting the plungers for reciprocation towards and away from the general plane of the web and through the body of printing medium, including sleeves in which the respective plungers reciprocate and which each communicate with said body and each have an open end facing the web;
- means for retracting said plungers in direction away from the web in the respective sleeves so as to segregate from the body of printing medium a metered amount of such medium, and for thereafter advancing the plungers towards the web;
- and means for applying segregated printing medium to the web on advancing of the plungers, including a portion of each plunger which expels the segregated printing medium through the respective open end onto the web.
An apparatus for printing on a web, comprising means for confining a body of printing medium;
- a plurality of plungers;
- means mounting said plungers for reciprocation towards and away from the general plane of the web, including for each plunger a sleeve having an open end facing the web and at least one port which is openable during reciprocation of the respective plunger for communication of the interior of the sleeve with said body of printing medium;
- means for pressurizing the body of printing medium to speed its entry into the sleeves through the opened ports;
- means for retracting said plungers in direction away from the web to segregate a metered quantity of printing medium from said body, and for thereafter advancing the plungers towards the web;
- and means for applying the segregated printing medium to the web prior to subsequent to advancing of the plungers.
An apparatus for printing on a web, comprising means for confining a body of printing medium of high viscosity;
- a plurality of plungers;
- means mounting the plungers for reciprocation towards and away from the general plane of the web and through the body of printing medium, including sleeves in which the respective plungers are reciprocable and which have openable ports for communication with the body of printing medium;
- means for temporarily arresting the respective plungers in their retracted position for a period of time sufficient for the highly viscous printing medium to enter the associated sleeves through the opened ports thereof;
- means for retracting said plungers in direction away from the web to segregate from the body of printing medium through said ports a metered quantity of the medium, and for thereafter advancing the plungers towards the web;
- and means for applying the segregated printing medium to the web prior or subsequent to advancing of the plungers.
An apparatus for printing on a web, comprising means for confining a body of printing medium;
- a plurality of plungers;
- means mounting said plungers for reciprocation towards and away from the general plane of the web, including for each plunger a sleeve having an open end facing the web and at least one port which is opened and closed by the associated plunger during reciprocation of the same for communication of the interior of the sleeve with said body of printing medium;
- means for reciprocating said plungers in said sleeves to segregate through the respective opened ports a metered quantity of the printing medium from said body;
- and means for applying the segregated printing medium to the web prior or subsequent to reciprocation of the plungers towards said general plane of the web.
Dependencies are inferred from the claim text.