Power actuated laminating machine

Abstract

An automatic laminating machine is provided for use with pre-fabricated laminating packets having a tear-off tab with a plurality of notches thereon. The machine is substantially automatic in its operation and can be easily operated by an inexperienced operator. The machine requires no warm-up time and heats up in only 10 seconds each time a packet is inserted. The machine will not operate unless it is used with a laminating packet with a pull tab of proper configuration which not only energizes the machine but also aligns the packet within the machine.

We claim: 
     
       1. A laminating machine for use with pre-fabricated laminating packets wherein said packets have a pair of heat sealable sheets connected together at one edge with a tear-off tab at the point of connection, said tear-off tab having a generally straight end with a plurality of notches in said end, comprising in combination: a. upper and lower flat heating elements;   b. upper and lower rollers adjacent the exit end of said heating elements and spaced therefrom;   c. stop fingers located between said heating element and said rollers, said fingers being adapted to engage the tab between the notches whereby portions of said tear off tab on said packet extend beyond said fingers and between said rollers;   d. means for bringing said heating elements and said rollers together to engage the heat sealable portion of a laminating packet between the heating elements and the tab between said rollers and simultaneously move said fingers out of contact with said packet;   e. means for maintaining said packet between said heating elements for time sufficient to soften the laminating sheets; and   f. motor means for rotating said rollers to pull said packet between said rollers to complete the laminating operation.   
     
     
       2. The laminating machine of claim 1 wherein the heating elements each include a printed circuit heater adjacent a flat metal plate. 
     
     
       3. The structure of claim 2 wherein each said flat metal plate is provided with a non-stick coating of a flurocarbon resin. 
     
     
       4. The laminating machine of claim 1 having a base with said lower heating element and said lower roller mounted thereon and having a carriage mounted for limited up and down movement over said base with said upper heating element and said upper roller mounted on said carriage and means for moving said carriage toward and away from said base. 
     
     
       5. The laminating machine of claim 1 having detecting means, said detecting means preventing operation of said heating elements in the absence of a packet having tabs in said machine. 
     
     
       6. The laminating machine of claim 5 wherein the detecting means includes a feeler to detect the presence of a tab between said fingers. .Iadd. 
     
     
       7.  A laminating machine for use with pre-fabricated laminating packets wherein said packets have a pair of heat sealable sheets connected together at one edge with a tear-off tab at the point of connection, said tear-off tab having a generally straight end, comprising in combination: a. upper and lower flat heating elements;   b. upper and lower rollers adjacent the exit end of said heating elements and spaced therefrom;   c. stop means engaging the tab such that portions of said tear off tab on said packet extend between said rollers and the heat sealable portion of the laminating packet is positioned between the heating elements;   d. means for engaging the tab between said rollers;   e. means for maintaining said packet between said heating elements for time sufficient to soften the laminating sheets; and   f. motor means for rotating said rollers after the laminating sheets are softened to pull said packet between said rollers to complete the laminating operation. .Iaddend.