Drilling printed circuit boards, its entry and backing boards

PCT No. PCT/GB92/00199 Sec. 371 Date Sep. 15, 1993 Sec. 102(e) Date Sep. 15, 1993 PCT Filed Feb. 3, 1992 PCT Pub. No. WO92/14346 PCT Pub. Date Aug. 20, 1992.The invention provides an entry board for use adjacent a printed circuit board during drilling therethrough comprising a drill lubricant distri...

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Bibliographische Detailangaben
1. Verfasser:	R. W. WEINREICH
Format:	Patent
Sprache:	eng
Schlagworte:	BORING CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CUTTING CUTTING-OUT DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING,CUTTING-OUT, STAMPING-OUT OR SEVERING ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY HAND CUTTING TOOLS MACHINE TOOLS MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORATING PERFORMING OPERATIONS PRINTED CIRCUITS PUNCHING SEVERING SEVERING BY MEANS OTHER THAN CUTTING STAMPING-OUT TRANSPORTING TURNING
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Zusammenfassung:	PCT No. PCT/GB92/00199 Sec. 371 Date Sep. 15, 1993 Sec. 102(e) Date Sep. 15, 1993 PCT Filed Feb. 3, 1992 PCT Pub. No. WO92/14346 PCT Pub. Date Aug. 20, 1992.The invention provides an entry board for use adjacent a printed circuit board during drilling therethrough comprising a drill lubricant distributed over the entry board. The board may comprise two or more separable laminar components (A, B) one of which has the drill lubricant. There is also provided a composite entry or backing board for use adjacent a printed circuit board during drilling therethrough, in which the adjacent faces of two laminar components of the entry or backing board are joined such that there is no relative slip during transportation, cutting and positioning, and they are separable by peeling them apart after use.