Abstract:
A bottle body comprises: a main body extending from a base to a shoulder; a neck extending from the shoulder to a mouth a thread along the neck; and one or more recesses along an exterior of the neck and extending along a longitudinal span of at least 30 mm.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    Benefit is claimed of U.S. Patent Application No.  62 / 369 , 509 , filed Aug.  1 ,  2016 , and entitled “Fuel Additive Bottles Compatible with Capless Fuel Systems”, the disclosure of which is incorporated by reference herein in its entirety as if set forth at length. 
     
    
     BACKGROUND 
       [0002]    The disclosure relates to fuel additive bottles. More particularly, the disclosure relates to bottles compatible with capless fuel systems. 
         [0003]    Fuel additive bottles for use with capless fuel systems are show in: United States Patent Application Publication 20160031697 A1, of Zweifel, published Feb. 4, 2016 and entitled “CATCH RELEASING CAPLESS FUEL-FILLER BOTTLE; United States Patent Application Publication 20150298384 A1, of McKenzie et al., published Oct. 22, 2015 and entitled “FUEL ADDITIVE BOTTLE FOR COMPATIBILITY WITH CAPLESS FUEL TANK; and United States Patent Application Publication 20150013822 A1, of Baker, published Jan. 15, 2015 and entitled “FUEL ADDITIVE BOTTLE FOR USE WITH CAPLESS FUEL SYSTEM”. The disclosures of these publications ae incorporated by reference in their entireties herein as if set forth at length. 
         [0004]    The three publications identified above all disclose different molded plastic bottles having threaded mouths. McKenzie et al. has an internally-threaded mouth. This avoids catching of threads on internal flaps or other elements of the capless filler. 
         [0005]    The Baker publication and the Zweifel publication each disclose thread interruptions. The Baker publication involves an interruption as a local flat reducing the height of the thread. The Zweifel publication involves a recess fully penetrating the thread. 
       SUMMARY 
       [0006]    One aspect of the disclosure involves a bottle body comprising: a main body extending from a base to a shoulder; a neck extending from the shoulder to a mouth a thread along the neck; and one or more recesses along an exterior of the neck and extending along a longitudinal span of at least 30 mm. 
         [0007]    In one or more embodiments of any of the foregoing embodiments, the thread is an external thread. 
         [0008]    In one or more embodiments of any of the foregoing embodiments, the external thread is flush or subflush to a portion of the neck through which the at least one recess passes. 
         [0009]    In one or more embodiments of any of the foregoing embodiments, the one or more recesses extend through the thread. 
         [0010]    In one or more embodiments of any of the foregoing embodiments, the one or more recesses extend along an unthreaded portion of the neck below the thread. 
         [0011]    In one or more embodiments of any of the foregoing embodiments, the one or more recesses extend along a tapering portion of said unthreaded portion and a straight portion of said unthreaded portion between the tapering portion and the thread. 
         [0012]    In one or more embodiments of any of the foregoing embodiments, the one or more recesses comprise four recesses at 90° intervals about the neck. 
         [0013]    In one or more embodiments of any of the foregoing embodiments, the one or more recesses have depth of at least 1.0 mm. 
         [0014]    In one or more embodiments of any of the foregoing embodiments, the one or more recesses have depth of at least 1.0 mm. 
         [0015]    In one or more embodiments of any of the foregoing embodiments, the longitudinal span is at least 40 mm. 
         [0016]    In one or more embodiments of any of the foregoing embodiments, the bottle body is formed of molded plastic. 
         [0017]    In one or more embodiments of any of the foregoing embodiments, a bottle comprises the bottle body and further comprises a cap having a cap thread threaded to the bottle body thread. 
         [0018]    In one or more embodiments of any of the foregoing embodiments, the bottle further comprises fuel additive contained in the bottle body. 
         [0019]    In one or more embodiments of any of the foregoing embodiments, a method for using the bottle comprises: removing the cap; inserting the neck of the bottle body into a filler of a vehicle; and dispensing fuel additive from the bottle body into the filler. 
         [0020]    In one or more embodiments of any of the foregoing embodiments, during the dispensing, vapor vents through the at least one recess. 
         [0021]    The details of one or more embodiments are set forth in the accompanying drawings and the description below. Other features, objects, and advantages will be apparent from the description and drawings, and from the claims. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0022]      FIG. 1  is a front view of a bottle with a cap exploded away from the bottle body. 
           [0023]      FIG. 2  is a side view of the bottle body. 
           [0024]      FIG. 3  is a cutaway top view of the bottle body. 
           [0025]      FIG. 4  is a view of the body. 
       
    
    
       [0026]    Like reference numbers and designations in the various drawings indicate like elements. 
       DETAILED DESCRIPTION 
       [0027]      FIG. 1  shows a bottle  20  having a body  22  (e.g., injection blow molded) and a cap or closure  24  (e.g., injection molded). As is discussed further below, the bottle may represent a reengineering of one particular baseline. Other baselines include those of the three publications mentioned above and yet further bottles (e.g., including those with pry-off closures rather than threaded closures). The body  22  extends along a central longitudinal axis  500  (vertical in a normal upright storage condition of the bottle) from a base  26  to a mouth  28  at a rim  30 . The body has a main body portion  32  having a sidewall portion  34  transitioning at a shoulder  36  to a root  38  of a neck portion (neck)  40 . An upper portion  42  of the neck bears an external thread  44  for engaging a complementary internal thread of the closure. The exemplary thread is an industry-standard  22 -millimeter finish. The cap may be a child-resistant closure (CRC) (e.g., two-piece (not shown)) or a single-piece (exclusive of liner if any) continuous thread (CT) cap. 
         [0028]    Along an external surface  50 , the neck bears one or more longitudinal channels  52 . Exemplary channels  52  extend through the external thread  44  and along an unthreaded portion  54  of the neck, terminating at respective lower ends  56 . In the exemplary embodiment, there are four channels  52  at 90° intervals. 
         [0029]      FIG. 1  shows the channels extending an overall length L 1  from the rim  30  and along a length L 2  of the unthreaded portion. Exemplary L 1  is at least  40  mm and exemplary L 2  is at least 30 mm. 
         [0030]      FIG. 3  shows a channel base  60  diametrically recessed from the intact surface by an exemplary channel depth Di of at least 0.5 mm, more particularly, 0.8-2.0 mm or 0.9-1.5 mm. The exemplary channel width Wi is at least 1.0 mm, more particularly, at least 2.0 mm. In the exemplary embodiment, the channel base is approximately 2.0 mm wide with a channel mouth at the surface  50  being approximately 4.0 mm wide. 
         [0031]    Whereas the aforementioned recesses or flats of the Zweifel publication extend slightly onto the unthreaded portion of the neck, they do not extend far enough to reach any restriction in the filler (e.g., at a location of the hinge of the flapper in the single flapper embodiment illustrated and the outer of two flappers in the two-flapper embodiment). With the channels  52  long enough to pass adjacent any chokepoint in the filler, the channels may serve as vents to vent vapor from the tank and, thereby, speed the emptying of the bottle. 
         [0032]    Even if there is nominal clearance between the outer diameter surface of an ungrooved neck and the inner diameter surface of the filler, misalignment/deformation of the neck (i.e., the bottle axis  500  is rotated off parallel to the filler axis) may contribute to airflow blockage and thus hinder bottle emptying. By providing the channels  52 , emptying is facilitated despite misalignments. 
         [0033]    In the exemplary embodiment, the channels  52  extend along a straight essentially untapering upper portion  70  ( FIG. 1 ) of the unthreaded portion  50  and a downwardly divergent portion  72  therebelow. This divergent portion  72  has a small half angle θ (e.g., about 2°). In the context of a standard size capless filler, the exemplary diameter at the unthreaded portion upper portion  70  is 21.69 mm, transitioning to 22.69 mm at the base of the divergent portion at the groove lower ends  56 . A more broad example of diameter is 20.0 mm to 25.0 mm along these portions, with an exemplary 21.0 mm to 22.5 mm (or 21.50 mm to 22.0 mm) along the portion  70  and really no upper limit on the portion  72 . 
         [0034]    The bottle may be made using otherwise conventional or yet-developed materials and techniques. Exemplary materials are plastics such as polyethylene (e.g., HDPE) or polyethylene terephthalate (PET). An exemplary technique is injection blow molding. 
         [0035]    The use of “first”, “second”, and the like in the description and following claims is for differentiation within the claim only and does not necessarily indicate relative or absolute importance or temporal order. Similarly, the identification in a claim of one element as “first” (or the like) does not preclude such “first” element from identifying an element that is referred to as “second” (or the like) in another claim or in the description. 
         [0036]    One or more embodiments have been described. Nevertheless, it will be understood that various modifications may be made. For example, when applied to an existing basic system, details of such configuration or its associated use may influence details of particular implementations. Accordingly, other embodiments are within the scope of the following claims.