公开(公告)号：US5179770A

公开(公告)日：1993-01-19

申请号：US815854

申请日：1992-01-02

Applicant: James P. Block ,  Stanley W. Levasheff ,  Gordon G. Jarosek

Inventor： James P. Block ,  Stanley W. Levasheff ,  Gordon G. Jarosek

IPC: B21D13/04 ,  B31F1/28

CPC classification number: B31F1/2822 ,  B21D13/04 ,  F28F5/02 ,  Y10T156/1016 ,  Y10T156/1025 ,  Y10T29/302 ,  Y10T29/49906 ,  Y10T29/5198

Abstract: Three metal foils are simultaneously fed in opposing relationship through a machine which automatically fabricates a sheet metal sandwich structure therefrom. The foils are first tensioned in aligned opposing relationship. The center sheet is then fed through a pair of free floating gear shaped corrugator tools which form corrugations or undulations therein. Adhesive is then applied to the inner surfaces of the two outer foils and the three foils passed through a pair of drums which press the foils together between opposing metal bands and provide uniform heat thereto through the bands to effect curing of the adhesive. The foils are further pressed together between the bands by means of air diaphragms or bladders which provide hydraulically controlled clamping force thereto. Finally, the sandwich structure thus formed is trimmed and cut to form boards of the desired width and length.

Abstract translation: 三个金属箔通过自动地从其制造金属夹层结构的机器以相反的关系同时进给。 箔片首先以对齐的相对关系张紧。 然后，中心片材通过一对在其中形成波纹或起伏的自由浮动齿轮形波纹机工具进给。 然后将粘合剂施加到两个外箔的内表面，并且三个箔通过一对鼓，其将箔压在相对的金属带之间并且通过带提供均匀的热量以实现粘合剂的固化。 箔片通过提供液压控制的夹紧力的空气隔膜或气囊进一步压在带之间。 最后，如此形成的夹层结构被修整和切割以形成所需宽度和长度的板。

公开(公告)号：US4311419A

公开(公告)日：1982-01-19

申请号：US61594

申请日：1979-07-30

Applicant: James P. Block

Inventor： James P. Block

IPC: B32B15/08 ,  B23B35/00 ,  B32B15/14 ,  B32B43/00 ,  H05K1/03 ,  H05K3/00

CPC classification number: H05K3/0047 ,  B23B35/005 ,  H05K1/0366 ,  H05K2201/0284 ,  H05K2201/0293 ,  H05K2203/0152 ,  H05K2203/0214 ,  Y10T408/03 ,  Y10T83/9309

Abstract: An entry material for use in drilling circuit boards to avoid marring of such boards comprises a wood pulp-glass composite substrate having aluminum foil bonded to the opposite surfaces thereof. This entry material is relatively economical and has a stiffness sufficient to avoid upward bending or "oil canning" when pressure feet spaced from the drill are employed to hold the workpiece during drilling and further has enough strength to withstand high torsional drill forces with drills operating for high rates of material removal. The double layers of foil separated by the low heat conductive substrate material affords a pair of heat sinks which more effectively can carry away heat from the drill.

Abstract translation: 用于钻孔电路板以避免这种板的损坏的入口材料包括具有与其相对表面结合的铝箔的木浆玻璃复合基板。 该进入材料相对经济，并且具有足够的刚度，以在钻头间隔开压力脚以在钻孔期间保持工件时进一步避免向上弯曲或“油罐头”，并且还具有足够的强度以承受高的扭转钻力， 高速率的材料去除。 由低热传导基材材料分离的双层箔片提供了一对更有效地从钻头携带热量的散热器。

公开(公告)号：US4269549A

公开(公告)日：1981-05-26

申请号：US61592

申请日：1979-07-30

Applicant: James P. Block

Inventor： James P. Block

IPC: B32B3/28 ,  B23B35/00 ,  B23B47/28 ,  B23Q11/12 ,  B32B15/04 ,  H05K3/00 ,  H05K3/40

CPC classification number: H05K3/0047 ,  B23B35/005 ,  H05K2203/0214 ,  Y10T408/03 ,  Y10T408/561 ,  Y10T83/9309

Abstract: Backup material is formed from a pair of oppositely positioned metallic foil sheets between which an open metallic core having oppositely running node portions is sandwiched. The core may be sinusoidal with each node extending from one of the edges of the sheets to the opposite edges. This sandwich core backup material is placed beneath a printed circuit board to be drilled, such that with drilling, the drill penetrates through the top sheet and not the bottom sheet, thus terminating in the area of the open core. The backup material prevents the formation of burrs around the holes drilled in the circuit board and at the same time facilitates cooling the drill and the workpiece and the removal of cuttings therefrom.

Abstract translation: 备用材料由一对相对定位的金属箔片形成，其间夹着具有相对运行的节点部分的开放金属芯。 芯可以是正弦的，每个节点从片的边缘之一延伸到相对的边缘。 这种夹心芯支撑材料放置在待钻孔的印刷电路板的下面，使得在钻孔时钻头穿过顶片而不是底片，从而终止于开芯的区域。 备用材料防止在电路板中钻出的孔周围形成毛刺，并且同时有助于冷却钻孔和工件以及从中去除切屑。

公开(公告)号：US4019826A

公开(公告)日：1977-04-26

申请号：US371303

申请日：1973-06-18

Applicant: James P. Block

Inventor： James P. Block

IPC: B23B35/00 ,  B23B47/28 ,  H05K3/00

CPC classification number: H05K3/0047 ,  B23B35/005 ,  H05K2201/0284 ,  H05K2201/0293 ,  H05K2203/0152 ,  H05K2203/0214 ,  Y10T408/03 ,  Y10T408/08

Abstract: A metal foil, of a metal such as aluminum, is held in place over the drilling entry surface of a circuit board to be drilled. The drill thus first enters the foil which acts as a shield which takes burrs, pressure foot marks and particle marks which would otherwise be imparted to the surface of the circuit board. Further, the foil provides an even surface for the drill entry which tends to minimize drill wander and resultant hole mis-alignment which could occur if initial entry were to be made at the circuit board surface which is often uneven. After drilling has been completed, the foil is removed.

Abstract translation: 将诸如铝的金属的金属箔保持在待钻孔的电路板的钻孔入口表面上的适当位置。 因此，钻头首先进入作为屏蔽件的箔片，该箔片会产生否则会赋予电路板表面的毛刺，压脚和痕迹痕迹。 此外，箔提供用于钻入口的均匀表面，其倾向于最小化钻头漂移和由此导致的孔错误对准，如果在电路板表面上进行初始进入，这通常是不均匀的，则可能会发生这种错误。 钻孔完成后，将箔取出。