Geo M. Martin Co. v. Alliance MacHine Systems International, LLC

634 F. Supp. 2d 1024, 2008 U.S. Dist. LEXIS 95700, 2008 WL 4919400
District Court, N.D. California·Decided November 17, 2008·No. C 07-00692 WHA·Published·Cited by 2 cases

Opinion

ORDER GRANTING DEFENDANT’S RULE 50 MOTION ON THE ISSUE OF OBVIOUSNESS

INTRODUCTION

WILLIAM ALSUP, District Judge.

In this patent infringement action, defendant Alliance Machine Systems International, LLC, moves for judgment as a matter of law on the issue of obviousness after a two-week jury trial that resulted in a hung jury. For the reasons set forth below, Alliance’s motion is Granted.

STATEMENT

The history of this case has been explained in prior orders. In brief, plaintiff Martin Family Trust is the assignee of United States Patent No. 6,655,566 Bl, and plaintiff George M. Martin Company practices the claimed method as the Trust’s exclusive licensee.

The patent itself is directed to an improvement in bundle breakers. Bundle breakers are industrial machines that break stacked sheets of corrugated or other material, called “logs,” along perforated, scored or otherwise weakened lines into “bundles” (col.l:5 — 15). These machines are frequently used in the corrugated cardboard industry but can be used on a variety of materials such as corrugated paper or board, composition roofing shingles, and paper, plastic, or glass plates (col.l:17-23).

A bundle breaker is used in an assembly line, usually near the end of the line. Before reaching a bundle breaker, material such as corrugated board is cut into the desired shape and perforated, usually using a rotary die cutter. The resulting sheets are stacked into logs, each log about two feet high, and the logs are moved into position along a conveyor belt. Each sheet in the log has a weakened (or perforated) line along which all of the sheets will eventually be broken, said weakened lines arranged one on top of another so that they align vertically from the bottom of the log to the top of the log. So arranged, the log can be broken in half in one fell swoop.

A bundle breaker has two conveyor belts: an upstream conveyor belt and a downstream conveyor belt. Logs are moved to straddle the gap between the conveyor belts, where they are halted, are clamped into position, and are broken by pivoting one of the conveyor belts while the other belt and clamp holds the other side of the log in a fixed position. All of this was well known in the prior art.

A view of the patented bundle breaker is shown below, but prior art machines looked similar in all the major features:

*1026 [[Image here]]

As stated, bundle breakers were well known in the prior art. Bundle breakers wide enough to accommodate two or more side-by-side logs at once were also known. Earlier machines also used pivot action as the means to break the logs.

The patent in suit was aimed at a way to send two or more logs through side by side and to break them in one pivot of the conveyor belt and to accommodate slightly different log heights in doing so, the italicized language being the supposed improvement over the prior art.

To speed up the assembly line, it has long been desirable to break multiple logs simultaneously rather than one log at a time. As stated, the prior art already allowed breaking of several side-by-side logs simultaneously. One challenge for side-by-side logs, however, occurred when the logs were of slightly different heights such as 26 inches versus 25 and a half inches. As a result, a prior art clamping mechanism would put more pressure on the taller log and less on the shorter log. This would invite the logs to slip out of position or possibly crush the taller one. The prior art referred to this as “lack of compliance” (col.2:22-31). The '566 patent was directed to a supposed new way to ’ solve the compliance problem.

The '566 patent described an improvement to bundle breakers using a “compliance structure” that adjusted to the different heights.

*1027 [[Image here]]

The “compliance structure” {e.g., # 20 above) then used a “flexible member” {e.g., #22 above), coupled with a “rigid member” {e.g., # 33 above), to clamp the logs. The flexible member deformed in response to pressure so that it could exert more or less equal amounts of pressure on shorter and taller logs via the various rigid members. The rigid members were not connected and indeed were floating subject to pressure from the flexible member. In this way, the improved bundle breaker could clamp taller and shorter logs securely without damaging the resulting bundles and could break one and all simultaneously. (Of course, if the overall clamping pressure was set too high, then the bundle breaker would crush all of the logs but at least it would not crush a log simply because it was too tall.)

After Martin came out with its new bundle breakers, Aliance responded with its own new entry. Martin then accused Alliance of infringing the '566 patent. This order assumes for the sake of argument that the accused device did and still infringes.

After extended discovery and motion practice, the case was ready for trial. A bench trial was first held on “standing” to determine whether Martin was actually the exclusive licensee of the '566 patent and a proper plaintiff. After hearing two days of evidence, the Court found that Martin was the oral exclusive licensee of the '566 patent and a proper party to the lawsuit. A jury trial on the issues of infringement and invalidity came next. Martin asserted claims 1, 2, 3, 4, 7, 13, and 14. Claim 1 was the only independent claim asserted. It provided in relevant part (col,16:56-17:3):

An improvement in a bundle breaker for separating bundles from a log having a generally planar top surface,
said log including a plurality of sheets each having a generally planar top surface and each sheet is formed with at least one weakened line,

said weakened lines are vertically aligned in said log forming a weakened plane in said log, said bundle breaker including a first conveyor for conveying ■ said log and having an upstream end for receiving said log and a downstream end,

and a second conveyor having an upstream end positioned immediately adjacent to said downstream end of. said first conveyor providing a gap therebetween defining a bundle breaking plane,
said bundle breaker including first clamp means mounted for vertical reciprocating movement above said first conveyor,
and said second clamp means mounted above said second conveyor for vertical reciprocating movement in relation to said second conveyor and

*1028 said second conveyor and said second clamp means mounted for conjoint pivotal movement in relation to said bundle breaking plane for progressively breaking a bundle from said log along said weakened plane in said log,

said improvement comprising:
(a) a first compliance structure mounted on said first clamp means including,

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Geo M. Martin Co. v. Alliance MacHine Systems International, LLC, 634 F. Supp. 2d 1024, 2008 U.S. Dist. LEXIS 95700, 2008 WL 4919400 (N.D. Cal. 2008).

634 F. Supp. 2d 1024 (Geo M. Martin Co. v. Alliance MacHine Systems International, LLC) — published by Counsel Stack Legal Research, free access to 12M+ legal documents.

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