Abstract:
A cover for a notebook type computer, and a method of making same. The cover comprises a stiff metal body covered by a cosmetic shell. The body and shell are adhered together to form a composite cover. All force bearing elements, such as hinges and latches, are attached to the body, such that the shell need not endure applied force during use of the computer.

Description:
TECHNICAL FIELD 
     This invention relates to enclosures for information handling systems such as notebook and laptop computers, and more particularly to a cover for such computers. 
     BACKGROUND 
     As the value and use of information continues to increase, individuals and businesses seek additional ways to process and store information. One option available to users is information handling systems. An information handling system generally processes, compiles, stores, and/or communicates information or data for business, personal, or other purposes thereby allowing users to take advantage of the value of the information. Because technology and information handling needs and requirements vary between different users or applications, information handling systems may also vary regarding what information is handled, how the information is handled, how much information is processed, stored, or communicated, and how quickly and efficiently the information may be processed, stored, or communicated. The variations in information handling systems allow for information handling systems to be general or configured for a specific user or specific use such as financial transaction processing, airline reservations, enterprise data storage, or global communications. In addition, information handling systems may include a variety of hardware and software components that may be configured to process, store, and communicate information and may include one or more computer systems, data storage systems, and networking systems. 
     Notebook computers are a type of portable information handling system. Notebook computers characterized by their compact flat shape. They are typically small enough to fit in a briefcase. In addition to their size and portability, a difference between a notebook computer and a personal computer is the display screen computers use a variety of techniques, known as flat-panel technologies, to produce a lightweight and non-bulky display screen. 
     For a notebook computer, the display screen is placed on the inner surface of a hinged cover. The cover is hinged to the housing for the CPU, memory, and other computer hardware. The keyboard and other input mechanisms are placed on the top surface of this housing, such that the cover may be opened and tilted upward to expose the screen inside the cover and the keyboard atop the housing. 
     SUMMARY 
     In accordance with teachings of the present disclosure, a system and method are described for a cover for a notebook-type information handling system. For a notebook-type information handling system, it is assumed that the cover has a hinged attachment to a lower portion of the information handling system. 
     The cover comprises a rigid body, to which the hinge attachment means are attached. A cosmetic shell has a shape that is generally conformal over the body. The shell is adhered to the top surface of the body, thereby forming a composite structure. Like the hinges, all structural elements to which force may be applied, are attached to the rigid body, not to the shell. 
     The cover provides a low cost alternative to other covers, and provides equal or better functionality. The primary function of the body is structural, to provide strength and protection for the information handling system. The primary purpose of the shell is to simply provide an attractive appearance. 
     Because the body is not visible, minor cosmetic defects in the body are not important, and manufacturing yields are higher. The shell provides an attractive appearance, and eliminates the need for cleaning, reworking, priming, and painting processes associated with conventional metal-type notebook computer covers. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A more complete understanding of the present embodiments and advantages thereof may be acquired by referring to the following description taken in conjunction with the accompanying drawings, in which like reference numbers indicate like features, and wherein: 
         FIG. 1  illustrates a typical notebook-type information handling system. 
         FIG. 2  is an exploded view of a cover in accordance with the invention. 
         FIG. 3  is a perspective view of the bottom surface of the cover, prior to attachment of the display. 
         FIG. 4  is a perspective view of the top surface of the cover. 
         FIG. 5  is a chart illustrating the comparative strength of the cover versus a conventional cover. 
     
    
    
     DETAILED DESCRIPTION 
     Preferred embodiments and their advantages are best understood by reference to  FIGS. 1 through 5 , wherein like numbers are used to indicate like and corresponding parts. 
     For purposes of this disclosure, an information handling system may include any instrumentality or aggregate of instrumentalities operable to compute, classify, process, transmit, receive, retrieve, originate, switch, store, display, manifest, detect, record, reproduce, handle, or utilize any form of information, intelligence, or data for business, scientific, control, or other purposes. For example, an information handling system may be a personal computer, a network storage device, or any other suitable device and may vary in size, shape, performance, functionality, and price. The information handling system may include random access memory (RAM), one or more processing resources such as a central processing unit (CPU) or hardware or software control logic, ROM, and/or other types of nonvolatile memory. Additional components of the information handling system may include one or more disk drives, one or more network ports for communicating with external devices as well as various input and output (I/O) devices, such as a keyboard, a mouse, and a video display. The information handling system may also include one or more buses operable to transmit communications between the various hardware components. 
       FIG. 1  is a perspective view of a notebook computer  100 . Another type of small portable computer is a laptop computer. Technically, notebook computers are smaller than laptop computers. However, today, most laptop computers have been downsized to be notebook computers. For purposes of this description, the two terms are used synonymously. 
     Thus, although this description is in terms of a notebook computer, the term is used in its most general sense to include laptop computers, or any information handling system having a generally flat rectangular shape, a hinged flip-up cover, and its display mounted in the cover. 
     As stated in the Background, computer  100  has a bottom portion  101 , which contains the processing elements (not shown) and has various input devices (such as keyboard  102 ) mounted on its surface. Top portion  103  is attached by means of hinges  104  to the bottom portion  101 . Display screen  105  is mounted on the inside surface of the top portion  103 . It is attached to cover  106  by means of a facing  107 . 
     Cover  107  serves as the top outer surface of computer  100 . As explained below, cover  107  is made from two main pieces, that is, a high strength rigid body covered by a cosmetic shell. 
       FIG. 2  is an exploded view of cover  107 , showing body  21  and cosmetic shell  22 . Both body  21  and shell  22  have a generally flat planar shape. Shell  22  is molded or otherwise formed so as to be generally conformal to the top surface of body  21 . In other words, shell  22  has a generally flat planar shape and is easily placed atop body  21 . 
     Body  21  has a lip  21   a  that generally matches the thickness of display  105  (not shown in  FIG. 2 ). Shell  22  typically has a lip  22   a  that substantially covers lip  21   a.    
     Typically, body  21  is manufactured by means of a drawing process. By “drawn” is meant a process of molding metal by rolling or pulling through a die. 
     An example of a suitable material is aluminum. However, other high strength rigid materials may be used. The primary function of body  21  is to provide structural strength to protect display  105  and other internal components of notebook computer  100 . 
     A feature of the invention is that because body  21  is not visible under shell  22 , body  21  need not satisfy cosmetic requirements. In other words, the drawing process used to make body  21  may result in defects that are acceptable for structural requirements, but might not be acceptable if the body  21  were not to be covered by shell  22 . This results in higher manufacturing yields for body  21 , than for covers of other notebook computers that use drawn metals. 
     Shell  22  is typically made from a plastic material. The function of shell  22  is as a cosmetic surface for body  21 , and it need not provide structural strength. The material may be low cost, and the manufacturing process may be simple, such as a molding process. 
     Shell  22  need only provide an attractive appearance over body  21 . It may be rigid or flexible. Another example of a suitable material is fiberglass. 
     Furthermore, shell  22  absorbs no force applied to cover  107 . All structural elements to which force may be applied are attached to body  21 . For example, forces applied by opening and closing body  21  are applied via hinges  23  (shown in exploded view), which are attached to body  21 . Plates  24  or other means for attaching display  105  (not shown in  FIG. 2 ) are attached to body  21 . Similarly, latch  25  is attached to body  21 , as is the electrical connection  26  for display  105 . Forces normally occurring during use of computer  100  are applied to body  21  and not to shell  22 . 
       FIGS. 3 and 4  are an inner view and outer view, respectively, of cover  107 . Body  21  and shell  22  are adhered or otherwise firmly attached to each other, such that the top surface of body  21  is conforms against the bottom surface of shell  22 . Together, they form a rigid composite cover  107 . 
     Referring especially to  FIG. 4 , logos or other design or enterprise marking insignia can be easily attached to the outer surface of shell  22 . The external appearance of cover  107  is dependent on shell  22  and not on body  21 . 
       FIG. 5  is a chart that compares an example of cover  107  to a conventional metal cover. In the example of  FIG. 5 , body  21  is made from aluminum, having a thickness of 0.8 mm. Shell  22  is made from plastic, having a thickness of 1.5 mm. A suitable plastic is polycarbonate (PC) combined with a plastic based on acrylonitrile-butadiene-styrene copolymers (ABS). For purpose of this description, a “plastic” is a generic name for certain synthetic or semi synthetic materials that can be molded or extruded into objects, such as shell  22 . 
     Cover  107  is compared to a conventional cover (not shown) made from magnesium and aluminum and having a thickness of 1.4 mm. 
     Both cover  107  and the conventional cover were subjected to FEA (finite element analysis) deformation testing. As indicated the maximum deformation of cover  107  was 5.54 mm, whereas the maximum deformation of the conventional cover was 5.80 mm. The deformation ratios were 0.96 and 1 respectively. Thus, cover  107  compares favorably to conventional covers in terms of strength and stiffness. 
     Although the disclosed embodiments have been described in detail, it should be understood that various changes, substitutions and alterations can be made to the embodiments without departing from their spirit and scope.