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In an activated carbon filter for reducing vapor emissions from a fuel supply system including, in a filter housing, a first connecting section for communication with the atmosphere and a second connecting section for communication with the fuel supply system, an activated carbon filter section is d

In an activated carbon filter for reducing vapor emissions from a fuel supply system including, in a filter housing, a first connecting section for communication with the atmosphere and a second connecting section for communication with the fuel supply system, an activated carbon filter section is disposed between the first and second connecting sections and a filter layer of a highly adsorptive filler material layer is disposed between the activated carbon filter section and the first connecting section to prevent any escape of vapors through the first connecting section to the atmosphere.

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1. An activated carbon filter particularly for reducing vapor emissions from a fuel supply system, said activated carbon filter including a housing with a first connecting section providing for communication with the atmosphere, a second connecting section for communication with the fuel supply syst

1. An activated carbon filter particularly for reducing vapor emissions from a fuel supply system, said activated carbon filter including a housing with a first connecting section providing for communication with the atmosphere, a second connecting section for communication with the fuel supply system, an activated carbon filter section disposed between said first and second connecting sections for communication with the fuel supply system, and a filter material layer of a highly adsorptive material disposed between said activated carbon filter section and said first connecting section, said highly adsorptive material consisting of at least one of zeolite, silicious gel, aluminum oxide, di-vinyl benzene styrol material and activated carbon fiber. 2. An activated carbon filter according to claim 1, wherein said filter layer consists of an electrically conductive highly adsorptive material and means are provided for electrically heating the filter layer. 3. An activated carbon filter according to claim 2, wherein said filter layer consists of one of an activated carbon fiber fabric and an activated carbon fiber fleece. 4. An activated carbon filter according to claim 1, wherein said activated carbon filter section comprises a housing portion with at least a first and a second chamber which are both filled with activated carbon pellets, and said second connecting section for communication with said fuel supply system is disposed adjacent said first chamber and said first connecting section for communication with the atmosphere is disposed adjacent said second chamber, and wherein said two chambers are in communication with each other by way of a filter layer of a fleece or fabric. 5. An activated carbon filter according to claim 4, wherein said filter layer is disposed at one end of said activated carbon filter opposite said connection sections and a spring-loaded pressure plate is disposed adjacent said filter layer for biasing said filter layer against the activated carbon pellets in said first and second chambers. 6. An activated carbon filter according to claim 1, wherein said second connection section includes a connection for communication with a fuel tank of a fuel supply system and a connection for communication with a vacuum arrangement of an internal combustion engine, a filter fleece or fabric covering the activated carbon filter section toward said vacuum communication connection, and said fuel tank connection including a tubular housing structure of a net-like filter fabric extending into the adjacent activated carbon filter section.