Flat lapping machine

A flat lapping machine of the type including a plural number of carriers located around and driven by a center gear connected to a drive source, each carrier being capable of retaining a work thereon for lapping said work by upper and lower lapping plates, the improvement comprising, in combination, a plurality of support gear mechanisms located around said center gear and each comprising a plural number of small gears surrounding each carrier and supporting each carrier rotatably in predetermined positions;

• each carrier being provided with at least one eccentrically positioned work retaining pocket, said carrier defining an essentially radial groove communicating with said work retaining pocket to cause said carrier to define a split ring, said split ring constituting releasable restraining means for holding a work in said work retaining pocket.

A flat lapping machine of the type including a plural number of carriers located around and driven by a center gear connected to a drive source, each carrier being capable of retaining a work thereon for lapping said work by upper and lower lapping plates, the improvement comprising, in combination:

• a plural number of support gear mechanisms located in equidistant positions around said center gear and each constituted by a plural number of small gears to support said carriers rotatably in predetermined positions;
• said carriers being each provided eccentrically with a single work retaining pocket having a contour, the contour of which is partly shaped by tapered portions as a work means for restraining the work.

A flat lapping machine of the type including a plural number of carriers located around and driven by a center gear connected to a drive source, each carrier being capable of retaining a work thereon for lapping said work by upper and lower lapping plates, the improvement comprising, in combination:

• a plural number of support gear mechanisms located around said center gear and each constituted by a plural number of small gears to support said carriers rotatably in predetermined positions, said carriers being meshed with said center gear through small gears of said support gear mechanisms, said carriers each being provided with an eccentrically positioned work retaining pocket, plus restraining means for holding a work or works in restrained state in said work retaining pocket wherein said restraining means is constituted by tapered portions provided in part of said work retaining pocket.