The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 1985
Filed:
Oct. 31, 1983
Benjamin J Landesman, St. Louis, MO (US);
David A Landesman, St. Louis, MO (US);
Lawson Printing Machines Company, Inc., St. Louis, MO (US);
Abstract
A screen printing machine has a carousel rotatable about a central support and carrying a circular arrangement of work-receiving tables. A framework interconnected with the central support carries corresponding screen printing units. Rotation of the carousel causes the work-receiving tables to come into registry with corresponding printing units for screen printing of work carried by the work-receiving tables. Each such unit includes a squeegee support frame pivotal relative to the framework for movement between raised and lowered positions. A screen frame is carried by the squeegee support frame. A squeegee and a scraper blade are supported by a carriage traveling over the squeegee support frame for reciprocal movement over the stencil frame for screen printing of work pieces carried by a corresponding work-receiving table. A cam carried by the framework includes first and second planar surfaces forming an angle <180.degree. between them. A vertical drive shaft, turned by an electric motor, carries at its lower end a drive roller for rolling alternate engagement of the cam surfaces, there being springs for urging the squeegee frame toward its raised position, from which it is driven to the lowered, printing position by drive roller engagement with the cam surfaces. A crank is carried by the upper end of the drive shaft. A connecting rod interconnects the carriage and crank for causing reciprocating movement of the squeegee and the scraper blade upon rotation of the drive shaft.