Case for electronic tablet

A cover for a tablet computer comprising:

• first, second, third, and fourth edges, wherein the first and third edges extend in a first direction and are opposite to each other, and the second and fourth edges extend in a second direction and are opposite to each other,
• the second direction is transverse to the first direction, and the first edge is longer than the second edge,
• the first and second edges meet at a first corner,
• the second and third edges meet at a second corner,
• the third and fourth edges meet at a third corner, and
• the fourth and first edges meet at a fourth corner;
• an intersection point formed in the cover, wherein a vertex of first, second, and third polygon sections meet at the intersection point;
• the first polygon section having a first side formed by the first edge, a second side extending from the first edge to the intersection point, and a third side extending from the first edge to the intersection point, wherein the second and third sides are fold lines of the cover;
• the second polygon section having a first side formed by the first edge, a second side extending from the first edge to the intersection point and common with the second side of the first polygon section, and a third side extending from the first edge to the intersection point, wherein the second and third sides are fold lines of the cover;
• the third polygon section having a first side formed by the third edge, a second side extending from the third edge to the intersection point, and a third side extending from the third edge to the intersection point, wherein the second and third sides are fold lines of the cover, and there are no fold lines in the third polygon section;
• a fourth polygon section, formed adjacent to a first fold line that is adjacent the first polygon section, wherein the first fold line separates the first polygon section and the fourth polygon section,
• the fourth polygon section comprises at least a first vertex having a first radius of curvature and a second vertex having a second radius of curvature, the first radius of curvature is greater than the second radius of curvature, the first vertex is closer to the first edge than the third edge, and the second vertex is closer to the third edge than the first edge,
• the first fold line comprises a first width between a first point of the first polygon section and a second point of the fourth polygon section, the first point and second point are on a first line,
• the first fold line comprises a second width between a third point of the first polygon section and a fourth point of the fourth polygon section, the third point and fourth point are on a second line that is parallel to the first line,
• the first width is closer to the first edge of the cover than is the second width, and
• the first width being closer to the first vertex having the first radius of curvature than is the second width, the first width is greater than the second width;
• and
• a flap portion, coupled to the third edge of the cover, wherein a length of the flap portion extending in the first direction is less than a length of the third edge of the cover, the flap portion comprises a closed polygonal shape, and the second vertex is closer to the flap portion than is the first vertex,
• the first corner joins the first edge and the second edge and comprises an arc having a third radius of curvature, which results in the first corner being a rounded corner, and the third radius of curvature is greater than the first radius of curvature and the second radius of curvature,
• the second corner joins the second edge to the third edge and comprises an arc having the third radius of curvature, which results in the second corner being a rounded corner,
• the third corner joins the first edge to the fourth edge and comprises an arc having the third radius of curvature, which results in the third corner being a rounded corner, and
• the fourth corner joins the third edge to the fourth edge and comprises an arc having the third radius of curvature, which results in the fourth corner being a rounded corner.

A cover for a tablet computer comprising:

• first, second, third, and fourth edges, wherein the first and third edges extend in a first direction and are opposite to each other, and the second and fourth edges extend in a second direction and are opposite to each other,
• the second direction is transverse to the first direction, and the first edge is longer than the second edge,
• the first and second edges meet at a first corner,
• the second and third edges meet at a second corner,
• the third and fourth edges meet at a third corner, and
• the fourth and first edges meet at a fourth corner;
• an intersection point of five fold lines formed in the cover, wherein the intersection point is positioned closer to the first edge than the third edge;
• a first fold line, extending from a first position on the first edge to the intersection point;
• a second fold line, extending from a second position on the first edge to the intersection point;
• a third fold line, extending from a third position on the first edge to the intersection point, wherein the first position is a first distance from the second edge, the second position is a second distance from the second edge, and the third position is a third distance from the second edge, and
• the third distance is longer than the second distance, and the second distance is longer than the first distance;
• a fourth fold line, extending from the second corner to the intersection point, wherein a fourth position is on a line of the third edge, a fourth distance extends from the fourth position to an intersection of the fourth fold line with the line of the third edge,
• bounded by the first fold line, fourth fold line, and the second edge is a first polygon region, wherein the first polygon region comprises at least a first vertex having a first radius of curvature and a second vertex having a second radius of curvature,
• the first radius of curvature is greater than the second radius of curvature, the first vertex is closer to the first edge than the third edge, and the second vertex is closer to the third edge than the first edge,
• as a result of the first radius of curvature being greater than the second radius of curvature, the first distance is greater than the fourth distance,
• the second corner is between the fourth position on the third edge and a fifth position on the second edge, the third edge is joined to the second edge by an arc having a third radius of curvature, which results in the second corner being a rounded corner, and the third radius of curvature is greater than the first radius of curvature and the second radius of curvature, and
• the first corner is a rounded corner having the third radius of curvature, the third corner is a rounded corner having the third radius of curvature, and the fourth corner is a rounded corner having the third radius of curvature;
• a fifth fold line, extending from the third corner to the intersection point;
• a second polygon region having sides formed by the third edge, fourth fold line, and fifth fold line, wherein there are no fold lines in the second polygon region, and
• the second corner comprises the second vertex of the first polygon region and a third vertex of the second polygon region, the second vertex and third vertex are adjacent, and the third vertex has the second radius of curvature;
• and
• a flap portion, coupled to the third edge of the cover, wherein a length of the flap portion extending in the first direction from a first flap portion edge to a second flap portion edge is less than a length of the third edge of the cover, the first flap portion edge does not extend in the first direction toward the second edge beyond the intersection of the fourth fold line with the third edge, the flap portion comprises a closed polygonal shape, and the second vertex is closer to the flap portion than is the first vertex.