Bridgestone Corporation

Midori Co., Ltd.

Shinsuke Nakamura

Satoshi Mochizuki

Naoki Hariu

A pneumatic tire for heavy load has a tread, circumferential grooves () extending continuously in the tread circumferential direction, transverse grooves () opening to the circumferential grooves () adjacent each other in the tread width direction, and a block () defined by the circumferential grooves () and the transverse grooves () on a surface () of the tread. The block () is provided with one or more shallow grooves (-) having an average groove depth shallower than a groove depth of the circumferential grooves () adjacent to the block (). The average groove depth of the shallow grooves (-) is greater than 20% and less than 80% of the groove depth of the circumferential grooves (). At least one of the shallow grooves (-) opens to at least one of the transverse grooves () and the circumferential grooves () adjacent to the block ().

Pneumatic tire for heavy load

A pneumatic tire whose rim slip resistance and durability are improved by optimizing the shape of the bead base is provided. A polygonal bead corehaving a bottomextending generally along the tire width direction is embedded in a bead portion. The bead portionhas a bead baseextending between a bead heeland a bead toe. A maximum displacement pointis within a range of 25% or less of the width w of the bottom of the bead core with the third base point. The interference tat the maximum displacement pointis 1.1 to 1.3 times as much as the interference tat the second base point. the bead baseextends at least between the bead heeland the first base pointand has a first tapered portionwith a taper angle &#x3b8;being identical with or greater by three degrees or less than a taper angle &#x3b8;of a bead seat of the standard rim R.

Pneumatic tire

A tape dispenser has a housing in which a roll of adhesive tape is rotatably supported, a cutter provided on the front of the housing for cutting the adhesive tape to desired lengths, an adhering member for adhering the tape dispenser to a supporting surface, and both a support rod rotatably mounted to the housing, and a ring-shaped support disposed at an end of the support rod and rotatably supported by the adhering member. Thus, with the adhering member adhering the tape dispenser to a supporting surface, the housing of the tape dispenser can be rotated about the support rod so as to be movable between vertical and horizontal orientations. Also, the housing can be rotated 360.degree. about the adhering member such that the cutter of the tape dispenser can be moved to a desired angular position while the tape dispenser remains adhered to the supporting surface. When the adhering member is a suction pad, a position adjusting mechanism is employed to place the suction pad in a suction state or a non-suction state.

Tape cutter

A rotary eraser has a simple structure, is extremely capable of erasing a letter or other printed material, and facilitates an adjustment of the position of the erase. The rotary eraser includes a cylindrical body, an eraser holder which holds a rod eraser and is rotated by pressing down the body, an outer cylinder which is rotatable together with the eraser holder, an energizing component which biases the eraser holder in a direction in which the rod eraser protrudes, and an eraser bearer by which the position of the eraser in the eraser holder can be changed when the outer cylinder is turned.

Growing community of inventors

Tokyo, Japan

Shinsuke Nakamura